Leslie Phillips as Dr. Tony Burke

Harry Secombe as Llewellyn Wendover

James Robertson Justice as Sir Lancelot Spratt

Angela Scoular as Ophelia O'Brien

Irene Handl as Mrs. Dailey

Simon Dee as Basil Beauchamp

Robert Morley as Captain George Spratt

Freddie Jones as Humphrey, the Master-at-Arms

Joan Sims as Russian Captain

John Le Mesurier as Purser

Graham Stark as Satterjee

Janet Mahoney as Dawn Dailey

Graham Chapman as Roddy

Jacki Piper as Pretty Girl

Fred Emney as Sir Thomas Relph

Yuri Borienko as Sick Russian

Gerald Sim as Doctor

Yutte Stensgaard as Eve

Jimmy Thompson as Dr. Houston

Sylvana Henriques as Audrey

Marcia Fox as Jean

Tom Kempinski as Stedman Green

Anthony Sharp as Chief Surgeon

Marianne Stone as Spinster

John Bluthal as Taxi Driver

Jack Armstrong as Passenger (uncredited)

Jack Arrow as Helmsman (uncredited)

Peter Avella as Russian Trawlerman (uncredited)

Joan Benham as Lady Relph (uncredited)

Celestine Burden as Mélisse Relph (uncredited)

Maurice Bush as Russian Trawlerman (uncredited)

Norman Chappell as Waiter (uncredited)

Maxwell Craig as Russian Trawlerman (uncredited)

Geoffrey Davies as Dr. Dick Stuart-Clark (uncredited)

Keith Denny as Fan (uncredited)

John Doye as Photographer (uncredited)

Angela Grant as Doctor Dare Fan (uncredited)

Dave Griffiths as Russian Trawlerman (uncredited)

Patrick Halpin as Passenger (uncredited)

Jean Harrington as Nurse (uncredited)

Bill Hemmings as Passenger (uncredited)

Fred Machon as Passenger (uncredited)

Alf Mangan as Russian Trawlerman (uncredited)

Alan Meacham as Passenger (uncredited)

Gerald Paris as Taxi Driver (uncredited)

Luan Peters as Doctor Dare Fan (uncredited)

Ivor Ramsey as Boy (uncredited)

Edith Raye as Passenger (uncredited)

Jessie Robins as Passenger (uncredited)

Terry Sartain as Passenger (uncredited)

Bunny Seaman as Passenger (uncredited)

Sadie Slade as Nurse (uncredited)

Alecia St Leger as Passenger (uncredited)

Guy Standeven as Passerby (uncredited)

Reg Thomason as Passenger (uncredited)

Cy Town as Passenger (uncredited)

Totti Truman Taylor as Guest at Captain's Table (uncredited)

Jim Tyson as Cockney Dad (uncredited)

Colin Vancao as Mustachioed Man (uncredited)

Pearl Walters as Passenger (uncredited)

Bill Westley Sr. as Passenger (uncredited)

Sheila White as Nurse (uncredited)