Dr. Jay Rahman, registrar / Jay Rahman / Vijesh (35 episodes, 1990-1995)
Prof. Geoffrey Hoyt, general surgeon / Geoffrey Hoyt (34 episodes, 1992-1995)
Dr. Gail Benson, senior house officer / Gail Benson (34 episodes, 1992-1995)
Dr. Robert Nevin, senior registrar / Robert Nevin (33 episodes, 1992-1995)
Ruth Parry, administrator / Ruth Parry (29 episodes, 1992-1995)
Dr. Alison Makin, house officer / Alison Makin (27 episodes, 1992-1995)
Miss Helen Lomax, plastic surgeon (21 episodes, 1994-1995)
Dr. Tom Carey, research consultant / Tom Carey (20 episodes, 1992-1994)
Dr. Sarah Kemp, senior registrar (20 episodes, 1994-1995)
Claire Armstrong / Dr. Claire Armstrong - senior registrar (19 episodes, 1990-1994)
Billy Cheshire, charge nurse (19 episodes, 1994-1995)
Jess Hardman / Jessica Hardman (18 episodes, 1990-1993)
Derek Foster, resources manager (13 episodes, 1994-1995)
Janice Thornton, health care assistant / Janice Thornton (12 episodes, 1995)
Toby Maitland-Evans (11 episodes, 1992-1993)
Alex Taylor (10 episodes, 1990-1992)
Gavin Hall (8 episodes, 1990-1994)
Peter Vance, general surgeon (7 episodes, 1995)
Niall McGuiness / Niall McGuinness (6 episodes, 1990)
Annie Chung (6 episodes, 1990)
Iraj Iravani (6 episodes, 1990)
Alex Taylor (6 episodes, 1993)
Julie Colman (6 episodes, 1994)
Dr. Diana Hardy, consultant (5 episodes, 1995)
Reginald Girling (4 episodes, 1992-1993)
Austin Toynbee (3 episodes, 1990)
Dean of Medicine / The Dean (3 episodes, 1992-1993)
Liz Seymour, pathologist / Liz Seymour (3 episodes, 1995)
Clive Cotterell (3 episodes, 1995)
Mrs. Hardman / Ruth Hardman (2 episodes, 1990-1993)
Frances Robards (2 episodes, 1992)
Roger Sullivan (2 episodes, 1992)
Kate / Kate Walters (2 episodes, 1993)
Andrew Michaels / Dr. Cox (2 episodes, 1990-1993)
Mr. Draycott (2 episodes, 1993)
Theatre Nurse (2 episodes, 1992)
Perfusionist (2 episodes, 1993)
Anne Cornforth (1 episode, 1993)
Darren (1 episode, 1993)
Andrew Prior / Pathologist (2 episodes, 1990-1994)
Paul Stack (2 episodes, 1994-1995)
Douglas Beaumont (2 episodes, 1994)
Dr. Jill Collier (2 episodes, 1995)
Julia Torrance (1 episode, 1990)
Dominic Heard (1 episode, 1990)
Jean (1 episode, 1990)
Driver (1 episode, 1990)
Sue Holme (1 episode, 1990)
John (1 episode, 1990)
Louis Hardman (1 episode, 1990)
Hester Braden (1 episode, 1990)
Niki (1 episode, 1990)
Dave (1 episode, 1990)
Helen Palmer (1 episode, 1990)
Gudrun Devanney (1 episode, 1990)
Isabel Leland (1 episode, 1990)
Custody Sergeant (1 episode, 1990)
King (1 episode, 1990)
Professor Yardley (1 episode, 1990)
Stephanie Heard (1 episode, 1990)
Steve (1 episode, 1990)
Gatekeeper (1 episode, 1990)
Harold Atherton (1 episode, 1992)
Liam McGuinness (1 episode, 1990)
Social Worker (1 episode, 1990)
Jem (1 episode, 1990)
Jonathan Witley (1 episode, 1992)
Andrea Nicholson (1 episode, 1992)
Sarah (1 episode, 1990)
Sister Laura (1 episode, 1990)
Daphne (1 episode, 1990)
Nurse (1 episode, 1990)
Harry Liverege (1 episode, 1992)
Richard Hanson (1 episode, 1992)
Nursing Sister (1 episode, 1992)
Mr. Heller (1 episode, 1990)
Iris Packham (1 episode, 1990)
Invigilator (1 episode, 1990)
Jack (1 episode, 1990)
Ward Sister (1 episode, 1990)
Molly Gifford (1 episode, 1992)
Mrs. Ryan (1 episode, 1992)
Policeman (1 episode, 1992)
Colin (1 episode, 1992)
Elizabeth Hoyt (1 episode, 1993)
Mike Somerton (1 episode, 1993)
Heather McKinnon (1 episode, 1993)
Suzie (1 episode, 1990)
Detective 1 (1 episode, 1990)
Mrs. Grundig (1 episode, 1990)
Mrs. Allen (1 episode, 1990)
Charles Davies (1 episode, 1992)
Abbi Roux (1 episode, 1992)
Trevor (1 episode, 1992)
Mrs. Gupta (1 episode, 1992)
Pathologist (1 episode, 1992)
Holly Jarrett (1 episode, 1993)
Hugh Buckley (1 episode, 1993)
Lucy Wyatt (1 episode, 1993)
Sam (1 episode, 1990)
Tom (1 episode, 1990)
Detective 2 (1 episode, 1990)
Alison Wheeler (1 episode, 1990)
Mrs. Joyce (1 episode, 1990)
Maggie Robinson (1 episode, 1992)
Miss Cator (1 episode, 1992)
Brian Thomas (1 episode, 1992)
Mrs. Davies (1 episode, 1992)
Nick (1 episode, 1993)
William Jarrett (1 episode, 1993)
Richard (1 episode, 1993)
Maureen Crossey (1 episode, 1993)
Sarah Chung (1 episode, 1990)
Mrs. Wilde (1 episode, 1990)
Mr. Wheeler (1 episode, 1990)
Heather (1 episode, 1990)
Susan Thomas (1 episode, 1992)
Lois (1 episode, 1992)
Liz Box (1 episode, 1992)
Karen Walford (1 episode, 1992)
Mr. Patterson (1 episode, 1992)
Mrs. Kavanagh (1 episode, 1992)
Steven Nelson (1 episode, 1993)
Janet Wendell (1 episode, 1993)
Trish Clayburn (1 episode, 1993)
Mrs. Dixon (1 episode, 1993)
Sister Barstow (1 episode, 1993)
Mrs. Rogers (1 episode, 1993)
Wan Chung (1 episode, 1990)
Amy Box (1 episode, 1992)
Renal Nurse (1 episode, 1992)
David Flower (1 episode, 1992)
Angela (1 episode, 1992)
Secretary (1 episode, 1992)
Harry Turner (1 episode, 1992)
Vikki (1 episode, 1993)
Peter Wendell (1 episode, 1993)
Louise (1 episode, 1993)
Dee Pritchard (1 episode, 1993)
Enquiry Agent (1 episode, 1993)
Mr. King (1 episode, 1993)
Policeman (1 episode, 1990)
John (1 episode, 1992)
Emma Edmonds (1 episode, 1992)
Albert Clifford (1 episode, 1992)
Henry Singh (1 episode, 1992)
Steve Clayburn (1 episode, 1993)
Susan Cottersley (1 episode, 1993)
Ian McKinnon (1 episode, 1993)
Frank Baxter (1 episode, 1993)
Greg Maxwell (1 episode, 1992)
Alistair Boyd (1 episode, 1992)
Anaesthetist (1 episode, 1992)
Jeremy Spenser (1 episode, 1992)
Traffic Reporter (1 episode, 1992)
Simon Cottersley MP (1 episode, 1993)
Luke (1 episode, 1993)
Jennifer Haynes (1 episode, 1993)
Mary (1 episode, 1993)
Mrs. Chaudry (1 episode, 1993)
Kurt Gunter (1 episode, 1992)
Turnbull (1 episode, 1992)
Paul Gianotti (1 episode, 1992)
Mr. Smith (1 episode, 1992)
Jaya Chaudry (1 episode, 1993)
Dr. Tadman (1 episode, 1993)
Derek Wall (1 episode, 1993)
Ante-Natal Class Leader (1 episode, 1993)
Lee Kelly (1 episode, 1992)
Examiner (1 episode, 1992)
Professor Williams (1 episode, 1992)
Zoe Pemberton (1 episode, 1992)
A&E Nurse (1 episode, 1992)
Frank Draycott (1 episode, 1993)
Philip (1 episode, 1993)
Elaine (1 episode, 1993)
Paul Ryder (1 episode, 1993)
Reporter (1 episode, 1993)
Elaine (1 episode, 1992)
Mrs. Edwards (1 episode, 1992)
Anna Carpenter (1 episode, 1992)
Graham Lee (1 episode, 1993)
Mr. Carmichael (1 episode, 1993)
Chair of Ethics Committee (1 episode, 1993)
Gastro Sister (1 episode, 1993)
Gus Pemberton (1 episode, 1992)
Sir Alan Barnard (1 episode, 1992)
Anaesthetist (1 episode, 1993)
Alan (1 episode, 1993)
Gina (1 episode, 1993)
David (1 episode, 1993)
Agency Nurse (1 episode, 1993)
Anna Mordant (1 episode, 1994)
Stephen Prior (1 episode, 1994)
(1 episode, 1994)
Jawinder (1 episode, 1994)
Lynne Prior (1 episode, 1994)
Benny Bruce (1 episode, 1994)
Eve Dawson (1 episode, 1994)
Connie Dawson (1 episode, 1994)
Bosnian Patient (1 episode, 1994)
Pam Blake (1 episode, 1994)
Mrs. Chandra (1 episode, 1994)
Simon (1 episode, 1994)
Mr. Norris (1 episode, 1994)
Mr. Sharma (1 episode, 1994)
Brian Cullis (1 episode, 1994)
James Turner (1 episode, 1994)
Jean Doyle (1 episode, 1994)
Michael Blake (1 episode, 1994)
Mohan (1 episode, 1994)
Sita (1 episode, 1995)
Roy Banks (1 episode, 1995)
(1 episode, 1995)
Mr. Parry, Ruth's husband (1 episode, 1995)
Rebecca Whittaker (1 episode, 1995)
Joe Robson (1 episode, 1995)
Barbara Lawson (1 episode, 1995)
Matthew Parry (1 episode, 1995)
Sir Alan Barnard (1 episode, 1995)
Ian Hastings (1 episode, 1995)
Ronnie Porter (1 episode, 1995)
Cathy Whittaker (1 episode, 1995)
Nurse Howley (1 episode, 1995)
Tom Donnellan (1 episode, 1995)
Mark Whittaker (1 episode, 1995)
Eric Wilson (1 episode, 1995)
Penny Milner, paramedic (1995) (unknown episodes)