•
Dirk Bogarde as Dr Simon Sparrow •
Samantha Eggar as Delia Mallory •
James Robertson Justice as Sir Lancelot Spratt •
Donald Houston as Major Tommy French •
Barbara Murray as Iris Marchant •
Dennis Price as Dr Blacker •
Mylène Demongeot ('guest star') as Sonia and Helga •
Jill Adams as Genevieve Milton •
Timothy Bateson as Mr Holly • Jessie Evans as Mrs Parry •
Fenella Fielding as train passenger •
Frank Finlay as corsetière •
Michael Flanders as Bradby •
Derek Fowlds as Gillibrand •
Pauline Jameson as ward sister •
Bill Kerr as Australian sailor •
Ann Lynn as Mrs Whittaker •
Joe Robinson as Sonia's boyfriend •
Madge Ryan as Mrs Clapper •
David Weston as Dr Stewart •
Paul Whitsun-Jones as Grimes •
Ronnie Barker as man at railway station (uncredited) •
Amanda Barrie as Miss Steel (uncredited) •
Reginald Beckwith as Meyer (uncredited) •
Christopher Beeny as medical student (uncredited) •
John Bluthal as station porter (uncredited) • Margaret Boyd as Lady Willoughby (uncredited) •
Richard Briers as medical student (uncredited) •
Johnny Briggs as medical student (uncredited) •
Victor Brooks as policeman (uncredited) •
Peter Butterworth as ambulance man (uncredited) • Rodney Cardiff as student doctor (uncredited) •
Denise Coffey as station refreshments lady (uncredited) •
Felix Felton as health farm patient (uncredited) •
Hilda Fenemore as station café proprietor (uncredited) •
Michael Goldie as PT instructor (uncredited) •
Barbara Hicks as health farm receptionist (uncredited) •
Ronald Lacey as 2nd man in Mum's Diner (uncredited) •
Harry Landis as 1st man in Mum's Diner (uncredited) • Jeanette Landis as Rosie (uncredited) • Jill Mai Meredith as health farm nurse (uncredited) •
Leo McKern as Harry Heilbron (uncredited) •
Renu Setna as medical student (uncredited) •
Ronnie Stevens as hotel manager (uncredited) •
Marianne Stone as Mum's Diner waitress (uncredited) •
Toke Townley as clerk of works (uncredited) ==Production==