Dr. Spencer Quist (38 episodes, 1970-2016)
Colin Bradley (32 episodes, 1970-2016)
Dr. John Ridge (29 episodes, 1970-1972)
Barbara Mason (19 episodes, 1970-2016)
The Minister / Minister (15 episodes, 1970-2016)
Tobias Wren (14 episodes, 1970)
Commander Neil Stafford (12 episodes, 1972-2016)
Pat Hunnisett / Pat Hunisett (11 episodes, 1970)
Geoff Hardcastle (10 episodes, 1970-1971)
Dr. Anne Tarrant (10 episodes, 1970-2016)
Dr. Fay Chantry (9 episodes, 1971)
Woman / Laboratory Assistant / Nursing Sister / Secretary (1 episode, 1970-1972)
Richard Duncan (6 episodes, 1970-1972)
Man / Ambulance Driver / Manservant (2 episodes, 1970-1972)
Man / Barman / Man in Club (1 episode, 1970-1972)
Man / Laing / Young Man (1 episode, 1970-1972)
Bill - Doctor / Man / Rescuer / Steward (2 episodes, 1970-2016)
Captain - Second Airline Crew / Dr. Cordell / Jenson (3 episodes, 1970-1972)
Miss Wills / Edna (2 episodes, 1970-1972)
Bystander / Female Reporter / Nurse (3 episodes, 1970-1972)
Susan Proud (3 episodes, 1972)
Detective Constable / Man / Passer-by (Drunk) (1 episode, 1971-1972)
Woman / Female Magistrate (1 episode, 1970-1971)
Jim Bennett / Michael Beavis (2 episodes, 1970-1972)
Minister (2 episodes, 1970)
Joe Bates / Police Inspector (2 episodes, 1970-1972)
Coroner / Dai (2 episodes, 1970-1971)
Dr. Hugh Preston / Dr. Somerville (2 episodes, 1970-1971)
Sam Billings (2 episodes, 1970)
Minister / The Minister (2 episodes, 1970-1971)
Professor Eric Hayland / Wilfred Ridge (2 episodes, 1970-1972)
Colonel Jones / Dr. Wilson (2 episodes, 1970-1972)
Mrs. Knott / Mrs. Smith (2 episodes, 1970)
Bill Manzaro / Engineer - First Airline Crew (2 episodes, 1970-1972)
Reporter (2 episodes, 1970-1972)
Air Hostess / Dr. Gray (2 episodes, 1970-1971)
Air Commodore Parks (2 episodes, 1970)
Nurse / Police Woman (2 episodes, 1971)
Small Boy / Stephen Massingham (2 episodes, 1970-1972)
Mr. Hetherington / Prisoner Warren (2 episodes, 1971-1972)
Julie / Stewardess - Second Airline Crew (2 episodes, 1970-1972)
Chief Supt. Mallory / Major Sims (2 episodes, 1970-1972)
Barker / Halliday (GLC Man) (2 episodes, 1970-1972)
Receptionist / Woman (1 episode, 1971)
Arnold Payne / Dr. Ridley (2 episodes, 1971-1972)
Charles (Head Waiter) / Francesco Cavalli (2 episodes, 1970-1972)
Defending Solicitor / Mrs. Joan Simpson (2 episodes, 1970-1972)
Miss Cooper / Mrs. Harley (Woman in Couple) (2 episodes, 1970-1972)
Barmaid / Neapolitan Woman (1 episode, 1970-1972)
Miss Marshall / Woman (1 episode, 1971)
Computer Technician / Guard (1 episode, 1970)
Bystander / Woman (1 episode, 1971-1972)
Man / Ministry Inspector (1 episode, 1970-1972)
Miss Abrahams / WRAF Officer (1 episode, 1970-1972)
Detective Sergeant / Sergeant (2 episodes, 1970)
Man in Club / Tractor Driver (1 episode, 1972)
Man / Police Constable (1 episode, 1972)
Secretary (2 episodes, 1971-1972)
Man / Passer-by (Drunk) (1 episode, 1971)
Isaac Prentice (1 episode, 1971)
Mary Lincoln (1 episode, 1971)
Scobie (1 episode, 1971)
Vincent Llewellyn (1 episode, 1970)
Sergeant Willie Harris (1 episode, 1970)
Dr. Henry Fane (1 episode, 1971)
Mullery (1 episode, 1971)
Inspector Drew (1 episode, 1971)
John Mitchell (1 episode, 1970)
Peter Shipton (1 episode, 1970)
Reynolds (1 episode, 1970)
Geoff Harker (1 episode, 1970)
Commander Charles Keeping (1 episode, 1970)
Admiral Sir Richard Tranton (1 episode, 1970)
Dr. Charles Goldsworthy (1 episode, 1970)
Colonel Archibald Smithson (1 episode, 1970)
Dr. Mary Bryant (1 episode, 1970)
Thompson (1 episode, 1971)
Grant (1 episode, 1971)
Thomas Prentice (1 episode, 1971)
Botting (1 episode, 1971)
Professor Lewin (1 episode, 1971)
Mrs. Wilhelmina Grantz (1 episode, 1971)
Professore Fillippo Balbo (1 episode, 1972)
Mike Clark (1 episode, 1972)
Dr. Collinson (1 episode, 1970)
The Minister (John Davies) (1 episode, 1970)
Falken (1 episode, 1970)
Scott (1 episode, 1970)
Bernard Colley (1 episode, 1970)
Wilfred Ellis (1 episode, 1970)
Tom Hedley (1 episode, 1970)
Dick Larch (1 episode, 1970)
Dr. Anthony Lewis (1 episode, 1971)
Joan Prentice (1 episode, 1971)
'Griff' Griffiths (1 episode, 1971)
Dr. Ian Phelps (1 episode, 1971)
Cavendish (1 episode, 1971)
Dr. Ensor (1 episode, 1971)
John McAlister (1 episode, 1971)
PM's Secretary (1 episode, 1971)
CID Sergeant (1 episode, 1971)
Dr. Eric Godfrey (1 episode, 1971)
Dr. Jackson (1 episode, 1971)
Dr. McEwan (1 episode, 1972)
Paola Maria Totti (1 episode, 1972)
Alexander Drummond (1 episode, 1972)
Dr. Evans (1 episode, 1972)
Arthur Ballantyne (1 episode, 2016)
Dana Colley (1 episode, 1970)
Tom Reid (1 episode, 1970)
Sandy Larch (1 episode, 1970)
Mrs. Adams (1 episode, 1970)
Dr. Stella Robson (1 episode, 1970)
Prof. Hal Symonds (1 episode, 1970)
Branston (1 episode, 1970)
Dr. Alan Benson (1 episode, 1970)
Carol Larch (1 episode, 1970)
Dr. Judith Lennox (1 episode, 1970)
Superintendant (1 episode, 1970)
Senior House Officer (1 episode, 1971)
Sister Trewin (1 episode, 1971)
Gerald Marlowe (1 episode, 1971)
Janine Griffiths (1 episode, 1971)
Sir Billy Langly (1 episode, 1971)
Stephen Franklin (1 episode, 1971)
Alice (1 episode, 1971)
Marge Pritchard (1 episode, 1971)
Withers (1 episode, 1971)
Richard Massingham (1 episode, 1972)
Ian Drummond (1 episode, 1972)
Prof. Alec Hetherington (1 episode, 1972)
Guila (1 episode, 1972)
Dr. Margery Becker (1 episode, 1972)
Mrs. Catchpole (1 episode, 2016)
Bill Owen (1 episode, 1970)
Dr. Warren (1 episode, 1970)
Bill Jones (1 episode, 1970)
Miss Sephton (1 episode, 1970)
Johnny Clive (1 episode, 1970)
Colonel Kramer (1 episode, 1970)
Jack Foster (1 episode, 1970)
Joyce Chambers (1 episode, 1970)
Commander Sefton (1 episode, 1970)
Pegg (1 episode, 1970)
Minister's PPS (1 episode, 1971)
Judy Franklin (1 episode, 1971)
Kelsey (1 episode, 1971)
Air Hostess (1 episode, 1971)
Dennis Pritchard (1 episode, 1971)
Mrs. Hetherington (1 episode, 1971)
Naval Officer (1 episode, 1971)
Peggy Massingham (1 episode, 1972)
Phillip (1 episode, 1972)
Emily (1 episode, 1972)
Dr. Richard Poole (1 episode, 1972)
Mrs. Bell (1 episode, 1972)
Lord Purvis (1 episode, 2016)
Old Man (1 episode, 1970)
Cook (1 episode, 1970)
Stephens (1 episode, 1970)
Gus Clarke (1 episode, 1970)
Captain - First Airline Crew (1 episode, 1970)
Miss James (1 episode, 1970)
Dr. O'Brien (1 episode, 1970)
Fred Chambers (1 episode, 1970)
Elizabeth Llewellyn (1 episode, 1970)
Handyman (1 episode, 1971)
Reporter (1 episode, 1971)
Dr. Barton (1 episode, 1971)
Busby (1 episode, 1971)
Mr. Tearson (1 episode, 1971)
Journalist (1 episode, 1971)
Elliott (1 episode, 1971)
Gerald Jenkins (1 episode, 1971)
Harry Pritchard (1 episode, 1971)
Susan Lewis (1 episode, 1972)
Rev. Frank Simpson (1 episode, 1972)
Robert Cowley (1 episode, 1972)
Steven Granger (1 episode, 2016)
Gerald Astley (1 episode, 1970)
Toni Harker (1 episode, 1970)
Miss Jones (1 episode, 1970)
Mrs. Lucy Reid / Voice of Secretary (1 episode, 1970)
Bill Edwards (1 episode, 1970)
Young Man (1 episode, 1970)
Co-Pilot - First Airline Crew (1 episode, 1970)
Alan McArthur / Lyon McArthur (1 episode, 1971)
Arnold McPherson (1 episode, 1971)
Dr. George (1 episode, 1971)
Malcolm Priestland (1 episode, 1971)
Gillian Blake (1 episode, 1971)
Donovan (1 episode, 1971)
Joe Donovan (1 episode, 1971)
Mr. Faber (1 episode, 1971)
Philips (1 episode, 1971)
Stephen Grigg (1 episode, 1972)
First Sister (1 episode, 1972)
Robbie (1 episode, 1972)
Mrs. Hastings (1 episode, 2016)
Operator (1 episode, 1970)
Computer (1 episode, 1970)
Len White (2 episodes, 1970)
Captain Tommy Gort (1 episode, 1970)
Max Friedman (1 episode, 1970)
Mrs. Tyler (1 episode, 1970)
Reggie Cornford (1 episode, 1970)
Peter Hazlewood (1 episode, 1970)
Bryn (1 episode, 1970)
Stewardess - First Airline Crew (1 episode, 1970)
George Mason (1 episode, 1971)
Hilda (1 episode, 1971)
Flora Seton (1 episode, 1971)
Dog Owner (1 episode, 1971)
Inspector (1 episode, 1971)
David Wagstaffe (1 episode, 1971)
Mrs. Frank (1 episode, 1971)
Painton (1 episode, 1971)
Mr. Clark (1 episode, 1972)
Commodore Aylwood (1 episode, 1972)
Det. Chief Inspector Logan (1 episode, 1972)
Policeman (1 episode, 1972)
Second Sister (1 episode, 1972)
Mrs. Angela Cressy (1 episode, 2016)
Jack (1 episode, 1970)
Dave Cornford (1 episode, 1970)
Johnson (1 episode, 1970)
Chief Superintendent Charles (1 episode, 1970)
Stripper (1 episode, 1970)
Nurse Wilson (1 episode, 1970)
Nigel Waring (1 episode, 1971)
Jim Ainslie (1 episode, 1971)
Colin Tredget (1 episode, 1971)
Andrew Seton (1 episode, 1971)
Mrs. Freeman (1 episode, 1971)
Islander (1 episode, 1971)
Dr. Seaton (1 episode, 1971)
Mrs. Scobie (1 episode, 1971)
Tom Avery (1 episode, 1971)
Mr. Kemp (1 episode, 1971)
Mr. Duffy (1 episode, 1971)
Mrs. Duncan-Foster (1 episode, 1972)
Assistant (1 episode, 1972)
Dr. O'Dell (1 episode, 1972)
Prof. Fairbairn (1 episode, 2016)
Wing Commander (1 episode, 1970)
Brown (1 episode, 1970)
Angela Connor (1 episode, 1970)
Boy (1 episode, 1970)
Patterson (1 episode, 1971)
Mrs. Jones (1 episode, 1971)
Airport Policeman (1 episode, 1971)
Laurence Hetherington (1 episode, 1971)
Second Nurse (1 episode, 1971)
Policeman (1 episode, 1971)
Richard Whetlor (1 episode, 1971)
Chemist (1 episode, 1972)
Joan Sylvester (1 episode, 1972)
Rev. Charles Garrison (1 episode, 2016)
BBC Man London (1 episode, 1970)
Cobie Vale (1 episode, 1970)
Soldier (1 episode, 1970)
Co-Pilot - Second Airline Crew (1 episode, 1970)
Dr. Green (1 episode, 1970)
1st Man on Pier (2 episodes, 1970)
Priestland (1 episode, 1971)
Woman Shopper (1 episode, 1971)
Tom Walsh (1 episode, 1971)
Man in Flat (1 episode, 1971)
Norman Sylvester (1 episode, 1972)
Police Sergeant (1 episode, 1972)
Dick Burns (1 episode, 2016)
Chairman of Tribunal (1 episode, 1970)
BBC Man Houston (1 episode, 1970)
Lifeboatman (1 episode, 1970)
Mrs. Hunter (1 episode, 1970)
Stewardess - Second Airline Crew (1 episode, 1970)
Harry Nicholls (1 episode, 1971)
Ground Hostess (1 episode, 1971)
Visitor (1 episode, 1971)
Police Constable (1 episode, 1972)
Demonstrator (1 episode, 2016)
Wendy Hunter (1 episode, 1970)
Permanent Secretary (1 episode, 1970)
TV Commentator (1 episode, 1970)
Oscar Franklin (1 episode, 1971)
Jimmy Brookes (1 episode, 1971)
Josie Reynolds (1 episode, 1972)
Young Man (1 episode, 2016)
Engineer - Second Airline Crew (1 episode, 1970)
Mary Franklin (1 episode, 1971)
Passer-by (Drunk) (1 episode, 1971)
Prison Officer Clarke (1 episode, 1972)
Mike (1 episode, 1972)
Steward (1 episode, 2016)
Commissionaire (1 episode, 1970)
Dr. Whittaker (1 episode, 1971)
Airline Passenger (1 episode, 1970)
Dr. Carson (1 episode, 1971)
Radio Operator (1 episode, 1972)
Dr Robert Whitehead (1 episode, 1970)
Dr. Patrick (1 episode, 1970)
Benjamin Fielding (1 episode, 1970)
Gwilliam (1 episode, 1970)
Negro (1 episode, 1970)
Mrs. Bonenti (1 episode, 1970)
Prof. Miklos Egri (1 episode, 1970)
Dr Heinz Bau (1 episode, 1970)
Royston (1 episode, 1970)
Mrs. Patrick (1 episode, 1970)
Prosecuting Solicitor (1 episode, 1970)
Giles Patrick (1 episode, 1970)
Laura Lindsay (1 episode, 1970)
Mrs. Norman (1 episode, 1970)
Mr. Norman (1 episode, 1970)
Passer-by (1 episode, 1970)
Shopkeeper (1 episode, 1970)
Carlos (1 episode, 1972)
Sarah Collins (1 episode, 1972)
Harry (1 episode, 1972)
Ian (1 episode, 1972)
Rafael Dominguez (1 episode, 1972)
Dr. James Fulton (1 episode, 1972)
His Excellency (1 episode, 1972)
Roger Halls (1 episode, 1972)
Reporter (1 episode, 1972)
Sen. Connell (1 episode, 1972)
Joan Fulton (1 episode, 1972)
Lt. Commander Morrison (1 episode, 1972)
General Gunnarson (1 episode, 1972)
Hanif Khan (1 episode, 1972)
Adams (1 episode, 1972)
Michael Pratt (1 episode, 1972)
Dr. Ericson (1 episode, 1972)
Williams (1 episode, 1972)
Lady Janette Holroyd (1 episode, 1972)
David (1 episode, 1972)
Harry Brooke (1 episode, 1972)
Clive Hughes (1 episode, 1972)
Miss Brandon (1 episode, 1972)
Mr. Harley (Man in Couple) (1 episode, 1972)
Nick Critchley (1 episode, 1972)
Lawson (1 episode, 1972)
Gillie (1 episode, 1972)
Prof. Frank Holman (1 episode, 1972)
Eddie (1 episode, 1972)
Jimmy (Assistant) (1 episode, 1972)
BBC Reporter (1 episode, 1972)
Indian Familymember (1 episode, 1972)
Roger Halls (TV Reporter) (1 episode, 1972)
Mandy Fulton (1 episode, 1972)
Woman / Passenger - First Plane (uncredited) (10 episodes, 1970-1972)
Woman / Bar Customer / WRAF Officer (uncredited) (7 episodes, 1970-1971)
Man / Businessman / Governor / Tribunal Member (uncredited) (5 episodes, 1970-1972)
Man / Orderly (uncredited) (4 episodes, 1970-1972)
Bar Customer / Girl in Laboratory / WRAF Officer / Woman (uncredited) (4 episodes, 1970-1971)
Man (uncredited) (4 episodes, 1971-1972)
Man (uncredited) (3 episodes, 1970-1972)
Man / Lieutenant (uncredited) (3 episodes, 1970-1972)
Civil Servant / Computer Technician / Woman (uncredited) (3 episodes, 1970-1972)
Man (uncredited) (3 episodes, 1970-1971)
Man / Computer Technician (uncredited) (3 episodes, 1970-1971)
Man / Bar Customer (uncredited) (3 episodes, 1970-1971)
Man (uncredited) (3 episodes, 1970)
Man / Bar Customer (uncredited) (3 episodes, 1970)
Man / Police Constable (uncredited) (3 episodes, 1970)
Man (uncredited) (2 episodes, 1970-1972)
Man / Moustachioed Man (uncredited) (2 episodes, 1970-1972)
Man / Police Constable (uncredited) (2 episodes, 1970-1972)
Man / Newspaper Man (uncredited) (2 episodes, 1970-1972)
Man / Prison Officer (uncredited) (2 episodes, 1970-1972)
Lab Worker / Man / Man at Palazzo (uncredited) (2 episodes, 1970-1972)
Mrs. Wheeler / Woman (uncredited) (2 episodes, 1970-1972)
St. Simons' Islander / Woman (uncredited) (2 episodes, 1970-1971)
Woman (uncredited) (2 episodes, 1970-1971)
Man / Youth (uncredited) (2 episodes, 1970-1971)
Man / Patient (uncredited) (2 episodes, 1970-1971)
Male Magistrate / Man (uncredited) (2 episodes, 1970-1971)
Man / Man in Laboratory (uncredited) (2 episodes, 1970-1971)
Man (uncredited) (2 episodes, 1970-1971)
Man (uncredited) (2 episodes, 1970)
Lab Assistant / Man (uncredited) (2 episodes, 1970)
Lab Assistant / Man / Passenger - First Plane (uncredited) (2 episodes, 1970)
MC / Man (uncredited) (2 episodes, 1970)
Bar Customer / Man (uncredited) (2 episodes, 1970)
Woman (uncredited) (2 episodes, 1970)
Bar Customer / Woman (uncredited) (2 episodes, 1970)
Man / Squadron Leader (uncredited) (2 episodes, 1970)
Man / Man in Court (uncredited) (2 episodes, 1970)
Man (uncredited) (2 episodes, 1971-1972)
Woman (uncredited) (2 episodes, 1971)
Man (uncredited) (2 episodes, 1971)
Man / Man at Palazzo / Man in Club / Minister's P.P.S. (uncredited) (2 episodes, 1972)
Minister's Secretary / Police Constable / Woman at Palazzo (uncredited) (2 episodes, 1972)
Man (uncredited) (2 episodes, 1972)
Detective Constable / Man (uncredited) (2 episodes, 1972)
Man (uncredited) (1 episode, 1970)
Woman (uncredited) (1 episode, 1970)
Man in Court (uncredited) (1 episode, 1970)
Passenger - First Plane (uncredited) (1 episode, 1970)
Alan Chambers (uncredited) (1 episode, 1970)
Car Driver (uncredited) (1 episode, 1970)
Woman in Court (uncredited) (1 episode, 1970)
Bar Customer (uncredited) (1 episode, 1970)
Villager (uncredited) (1 episode, 1970)
Boy (uncredited) (1 episode, 1970)
RAF Man (uncredited) (1 episode, 1970)
Male Magistrate (uncredited) (1 episode, 1970)
Passenger - Second Plane (uncredited) (1 episode, 1970)
Stable Girl (uncredited) (1 episode, 1970)
WRAF Officer (uncredited) (1 episode, 1970)
Clerk of Court (uncredited) (1 episode, 1970)
Man on Pier (uncredited) (2 episodes, 1970)
WPC (uncredited) (1 episode, 1970)
Mother (uncredited) (1 episode, 1970)
Lab Assistant / Passenger - First Plane (uncredited) (1 episode, 1970)
Lab Assistant (uncredited) (1 episode, 1970)
Girl in Lab (uncredited) (1 episode, 1970)
Airport Passenger (uncredited) (1 episode, 1971)
Man (uncredited) (1 episode, 1971)
Woman (uncredited) (1 episode, 1971)
Islander (uncredited) (1 episode, 1971)
Elderly Woman (uncredited) (1 episode, 1971)
Elsdene Schoolboy (uncredited) (1 episode, 1971)
Patient (uncredited) (1 episode, 1971)
Radio DJ (uncredited) (1 episode, 1972)
Man (uncredited) (1 episode, 1972)
Club Barman / Man at Palazzo (uncredited) (1 episode, 1972)
Contessa at Palazzo / Ministry Extra (uncredited) (1 episode, 1972)
Woman (uncredited) (1 episode, 1972)
Newspaper Man (uncredited) (1 episode, 1972)
Civil Servant (uncredited) (1 episode, 1972)
Woman at Palazzo (uncredited) (1 episode, 1972)
Extra (uncredited) (1 episode, 1972)
Police Constable (uncredited) (1 episode, 1972)
Detective Constable (uncredited) (1 episode, 1972)
Nurse (uncredited) (1 episode, 1972)
Achmed (uncredited) (1 episode, 1972)
Club Steward / Man at Palazzo (uncredited) (1 episode, 1972)
BBC Disc Jockey (uncredited) (1 episode, 1972)
Man at Palazzo / Man in Club / Special Branch Man (uncredited) (1 episode, 1972)
Lab Worker / Man at Palazzo (uncredited) (1 episode, 1972)
Television Newsreader (uncredited) (1 episode, 2016)