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)
Colonel Jones / Dr. Wilson (2 episodes, 1970-1972)
Professor Eric Hayland / Wilfred Ridge (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)
Commander Charles Keeping (1 episode, 1970)
Reynolds (1 episode, 1970)
Peter Shipton (1 episode, 1970)
Geoff Harker (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)
Botting (1 episode, 1971)
Thomas Prentice (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)
Falken (1 episode, 1970)
Scott (1 episode, 1970)
Wilfred Ellis (1 episode, 1970)
Tom Hedley (1 episode, 1970)
Bernard Colley (1 episode, 1970)
The Minister (John Davies) (1 episode, 1970)
Dick Larch (1 episode, 1970)
Dr. Anthony Lewis (1 episode, 1971)
Joan Prentice (1 episode, 1971)
Dr. Ian Phelps (1 episode, 1971)
Cavendish (1 episode, 1971)
'Griff' Griffiths (1 episode, 1971)
John McAlister (1 episode, 1971)
Dr. Ensor (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)
Sandy Larch (1 episode, 1970)
Tom Reid (1 episode, 1970)
Dana Colley (1 episode, 1970)
Dr. Stella Robson (1 episode, 1970)
Mrs. Adams (1 episode, 1970)
Prof. Hal Symonds (1 episode, 1970)
Dr. Alan Benson (1 episode, 1970)
Dr. Judith Lennox (1 episode, 1970)
Branston (1 episode, 1970)
Carol Larch (1 episode, 1970)
Superintendant (1 episode, 1970)
Senior House Officer (1 episode, 1971)
Sister Trewin (1 episode, 1971)
Gerald Marlowe (1 episode, 1971)
Stephen Franklin (1 episode, 1971)
Alice (1 episode, 1971)
Janine Griffiths (1 episode, 1971)
Sir Billy Langly (1 episode, 1971)
Withers (1 episode, 1971)
Marge Pritchard (1 episode, 1971)
Richard Massingham (1 episode, 1972)
Ian Drummond (1 episode, 1972)
Dr. Margery Becker (1 episode, 1972)
Prof. Alec Hetherington (1 episode, 1972)
Guila (1 episode, 1972)
Mrs. Catchpole (1 episode, 2016)
Bill Owen (1 episode, 1970)
Dr. Warren (1 episode, 1970)
Miss Sephton (1 episode, 1970)
Johnny Clive (1 episode, 1970)
Bill Jones (1 episode, 1970)
Colonel Kramer (1 episode, 1970)
Commander Sefton (1 episode, 1970)
Jack Foster (1 episode, 1970)
Joyce Chambers (1 episode, 1970)
Pegg (1 episode, 1970)
Minister's PPS (1 episode, 1971)
Judy Franklin (1 episode, 1971)
Kelsey (1 episode, 1971)
Dennis Pritchard (1 episode, 1971)
Air Hostess (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)
Gus Clarke (1 episode, 1970)
Captain - First Airline Crew (1 episode, 1970)
Stephens (1 episode, 1970)
Miss James (1 episode, 1970)
Dr. O'Brien (1 episode, 1970)
Elizabeth Llewellyn (1 episode, 1970)
Fred Chambers (1 episode, 1970)
Handyman (1 episode, 1971)
Reporter (1 episode, 1971)
Busby (1 episode, 1971)
Dr. Barton (1 episode, 1971)
Mr. Tearson (1 episode, 1971)
Journalist (1 episode, 1971)
Gerald Jenkins (1 episode, 1971)
Elliott (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)
Mrs. Lucy Reid / Voice of Secretary (1 episode, 1970)
Bill Edwards (1 episode, 1970)
Miss Jones (1 episode, 1970)
Co-Pilot - First Airline Crew (1 episode, 1970)
Young Man (1 episode, 1970)
Alan McArthur / Lyon McArthur (1 episode, 1971)
Arnold McPherson (1 episode, 1971)
Malcolm Priestland (1 episode, 1971)
Gillian Blake (1 episode, 1971)
Dr. George (1 episode, 1971)
Mr. Faber (1 episode, 1971)
Joe Donovan (1 episode, 1971)
Donovan (1 episode, 1971)
Philips (1 episode, 1971)
Stephen Grigg (1 episode, 1972)
Robbie (1 episode, 1972)
First Sister (1 episode, 1972)
Mrs. Hastings (1 episode, 2016)
Operator (1 episode, 1970)
Computer (1 episode, 1970)
Captain Tommy Gort (1 episode, 1970)
Reggie Cornford (1 episode, 1970)
Len White (2 episodes, 1970)
Bryn (1 episode, 1970)
Mrs. Tyler (1 episode, 1970)
Peter Hazlewood (1 episode, 1970)
Max Friedman (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)
Painton (1 episode, 1971)
Mrs. Frank (1 episode, 1971)
Mr. Clark (1 episode, 1972)
Det. Chief Inspector Logan (1 episode, 1972)
Commodore Aylwood (1 episode, 1972)
Second Sister (1 episode, 1972)
Policeman (1 episode, 1972)
Mrs. Angela Cressy (1 episode, 2016)
Jack (1 episode, 1970)
Johnson (1 episode, 1970)
Nurse Wilson (1 episode, 1970)
Stripper (1 episode, 1970)
Chief Superintendent Charles (1 episode, 1970)
Dave Cornford (1 episode, 1970)
Nigel Waring (1 episode, 1971)
Jim Ainslie (1 episode, 1971)
Colin Tredget (1 episode, 1971)
Mrs. Freeman (1 episode, 1971)
Andrew Seton (1 episode, 1971)
Dr. Seaton (1 episode, 1971)
Islander (1 episode, 1971)
Mr. Kemp (1 episode, 1971)
Tom Avery (1 episode, 1971)
Mrs. Scobie (1 episode, 1971)
Mr. Duffy (1 episode, 1971)
Mrs. Duncan-Foster (1 episode, 1972)
Dr. O'Dell (1 episode, 1972)
Assistant (1 episode, 1972)
Brown (1 episode, 1970)
Wing Commander (1 episode, 1970)
Boy (1 episode, 1970)
Angela Connor (1 episode, 1970)
Airport Policeman (1 episode, 1971)
Mrs. Jones (1 episode, 1971)
Patterson (1 episode, 1971)
Policeman (1 episode, 1971)
Richard Whetlor (1 episode, 1971)
Laurence Hetherington (1 episode, 1971)
Second Nurse (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)
Tom Walsh (1 episode, 1971)
Woman Shopper (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)
Visitor (1 episode, 1971)
Ground Hostess (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 Heinz Bau (1 episode, 1970)
Mrs. Bonenti (1 episode, 1970)
Benjamin Fielding (1 episode, 1970)
Dr. Patrick (1 episode, 1970)
Prof. Miklos Egri (1 episode, 1970)
Negro (1 episode, 1970)
Gwilliam (1 episode, 1970)
Mrs. Patrick (1 episode, 1970)
Laura Lindsay (1 episode, 1970)
Prosecuting Solicitor (1 episode, 1970)
Mr. Norman (1 episode, 1970)
Royston (1 episode, 1970)
Mrs. Norman (1 episode, 1970)
Giles Patrick (1 episode, 1970)
Shopkeeper (1 episode, 1970)
Passer-by (1 episode, 1970)
Carlos (1 episode, 1972)
Sarah Collins (1 episode, 1972)
Harry (1 episode, 1972)
Ian (1 episode, 1972)
Reporter (1 episode, 1972)
Dr. James Fulton (1 episode, 1972)
His Excellency (1 episode, 1972)
Sen. Connell (1 episode, 1972)
Hanif Khan (1 episode, 1972)
Adams (1 episode, 1972)
Lt. Commander Morrison (1 episode, 1972)
Michael Pratt (1 episode, 1972)
Joan Fulton (1 episode, 1972)
General Gunnarson (1 episode, 1972)
Rafael Dominguez (1 episode, 1972)
Roger Halls (1 episode, 1972)
Dr. Ericson (1 episode, 1972)
Lady Janette Holroyd (1 episode, 1972)
Williams (1 episode, 1972)
David (1 episode, 1972)
Nick Critchley (1 episode, 1972)
Miss Brandon (1 episode, 1972)
Mr. Harley (Man in Couple) (1 episode, 1972)
Clive Hughes (1 episode, 1972)
Harry Brooke (1 episode, 1972)
Jimmy (Assistant) (1 episode, 1972)
Prof. Frank Holman (1 episode, 1972)
Lawson (1 episode, 1972)
Gillie (1 episode, 1972)
Indian Familymember (1 episode, 1972)
BBC Reporter (1 episode, 1972)
Roger Halls (TV Reporter) (1 episode, 1972)
Mandy Fulton (1 episode, 1972)
Eddie (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 / Newspaper Man (uncredited) (2 episodes, 1970-1972)
Man / Prison Officer (uncredited) (2 episodes, 1970-1972)
Man / Police Constable (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)
Male Magistrate / Man (uncredited) (2 episodes, 1970-1971)
Man (uncredited) (2 episodes, 1970-1971)
Man / Patient (uncredited) (2 episodes, 1970-1971)
Man / Youth (uncredited) (2 episodes, 1970-1971)
Man / Man in Laboratory (uncredited) (2 episodes, 1970-1971)
Man (uncredited) (2 episodes, 1970)
Lab Assistant / Man / Passenger - First Plane (uncredited) (2 episodes, 1970)
Man / Man in Court (uncredited) (2 episodes, 1970)
Woman (uncredited) (2 episodes, 1970)
Lab Assistant / Man (uncredited) (2 episodes, 1970)
MC / Man (uncredited) (2 episodes, 1970)
Man / Squadron Leader (uncredited) (2 episodes, 1970)
Bar Customer / Woman (uncredited) (2 episodes, 1970)
Bar Customer / Man (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)
Detective Constable / Man (uncredited) (2 episodes, 1972)
Man (uncredited) (2 episodes, 1972)
Minister's Secretary / Police Constable / Woman at Palazzo (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)
Bar Customer (uncredited) (1 episode, 1970)
Car Driver (uncredited) (1 episode, 1970)
Woman in Court (uncredited) (1 episode, 1970)
Male Magistrate (uncredited) (1 episode, 1970)
Alan Chambers (uncredited) (1 episode, 1970)
Boy (uncredited) (1 episode, 1970)
RAF Man (uncredited) (1 episode, 1970)
Lab Assistant (uncredited) (1 episode, 1970)
Lab Assistant / Passenger - First Plane (uncredited) (1 episode, 1970)
Villager (uncredited) (1 episode, 1970)
Girl in Lab (uncredited) (1 episode, 1970)
Stable Girl (uncredited) (1 episode, 1970)
Clerk of Court (uncredited) (1 episode, 1970)
Man on Pier (uncredited) (2 episodes, 1970)
WPC (uncredited) (1 episode, 1970)
WRAF Officer (uncredited) (1 episode, 1970)
Passenger - Second Plane (uncredited) (1 episode, 1970)
Mother (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)
Elsdene Schoolboy (uncredited) (1 episode, 1971)
Elderly Woman (uncredited) (1 episode, 1971)
Patient (uncredited) (1 episode, 1971)
Man (uncredited) (1 episode, 1972)
Radio DJ (uncredited) (1 episode, 1972)
Contessa at Palazzo / Ministry Extra (uncredited) (1 episode, 1972)
Woman (uncredited) (1 episode, 1972)
Club Barman / Man at Palazzo (uncredited) (1 episode, 1972)
Extra (uncredited) (1 episode, 1972)
Woman at Palazzo (uncredited) (1 episode, 1972)
BBC Disc Jockey (uncredited) (1 episode, 1972)
Police Constable (uncredited) (1 episode, 1972)
Man at Palazzo / Man in Club / Special Branch Man (uncredited) (1 episode, 1972)
Newspaper Man (uncredited) (1 episode, 1972)
Club Steward / Man at Palazzo (uncredited) (1 episode, 1972)
Lab Worker / Man at Palazzo (uncredited) (1 episode, 1972)
Civil Servant (uncredited) (1 episode, 1972)
Detective Constable (uncredited) (1 episode, 1972)
Achmed (uncredited) (1 episode, 1972)
Nurse (uncredited) (1 episode, 1972)
Television Newsreader (uncredited) (1 episode, 2016)