Dirk Bogarde as Dr. Simon Sparrow

Muriel Pavlow as Joy Gibson

Donald Sinden as Dr. Tony Benskin

James Robertson Justice as Sir Lancelot Spratt

Shirley Eaton as Nurse Nan MacPherson

Derek Farr as Dr. Erasmus Potter-Shine

Michael Medwin as Dr. Charlie Bingham

Martin Benson as Maharajah of Branda

John Chandos as O'Malley

Edward Chapman as Mr. Wilkins

George Coulouris as Pascoe

Judith Furse as Mrs. Digby

Gladys Henson as Mrs. Wilkins

Anne Heywood as Emerald

Ernest Jay as Sir Charles Hopcroft

Lionel Jeffries as Dr. Hampton Hatchet

Mervyn Johns as Mr. Smith

Geoffrey Keen as Examiner

Dilys Laye as Mrs. Jasmine Hatchet

Harry Locke as Harry Jessup

Terence Longdon as George

A.E. Matthews as Duke of Skye and Lewes

Guy Middleton as Major Porter

Barbara Murray as Kitty

Dandy Nichols as Mrs. Law

Nicholas Phipps as Mr. Wayland

Wensley Pithey as Sam

Maureen Pryor as Mrs. Dalton

Noel Purcell as Padre

George Relph as Dr. Farquarson

Athene Seyler as Lady Hawkins

Ronnie Stevens as Waiter at Hotel

Ernest Thesiger as Examiner

Michael Trubshawe as Colonel Graves

Freda Bamford as Eva's Mother (uncredited)

Abe Barker as Old Ives (uncredited)

Eddie Boyce as Surgeon (uncredited)

Dennis Carnell as Anaesthetist (uncredited)

Tony Castleton as Medical Student (uncredited)

Cyril Chamberlain as Police Constable (uncredited)

Jimmy Charters as Patient (uncredited)

Peggy Ann Clifford as Large French Swimmer (uncredited)

Campbell Cotts as Butler (uncredited)

Junia Crawford as Girl on Boat (uncredited)

Reggie de Beer as Surgeon (uncredited)

Jack Dearlove as Medical Student (uncredited)

Chick Fowles as Passerby (uncredited)

Richard Gordon as George Stubbins (uncredited)

Victor Harrington as House Surgeon (uncredited)

Douglas Ives as Elephant Keeper (uncredited)

Gertrude Kaye as Outpatient (uncredited)

June Laverick as Secretary (uncredited)

Wilfrid Lawson as Dustman with Cyst (uncredited)

Charles Lloyd Pack as Man (uncredited)

Bernard Miles as Haymaking Farmer (uncredited)

John Pike as Haymaking Farmer's Son (uncredited)

Frederick Piper as Ernest (uncredited)

Carol Richmond as Eva (uncredited)

Beth Rogan as Clerk (uncredited)

Barbara Roscoe as Haymaking Farmer's Daughter (uncredited)

Arthur Sandifer as Barman (uncredited)

Jean St. Clair as Oona (uncredited)

Guy Standeven as Student Doctor (uncredited)

Vi Stevens as Outpatient (uncredited)

Graham Tonbridge as Surgeon (uncredited)

Molly Urquhart as Mrs. Ives (uncredited)