Laurence Harvey

Lieutenant "Buster" Crabb, R.N.V.R.

Michael Craig

Leading Seaman Knowles

Dawn Addams

Third Officer Jill Masters, W.R.N.S

Sid James

Chief Petty Officer Thorpe

Alec McCowen

Able Seaman Morgan

Nigel Stock

Able Seaman Fraser

Gianna Maria Canale

Conchita

Massimo Serato

Forzenelli

Giacomo Rossi Stuart

Rosati

Raymond Young

Celloni

David Lodge

Sergeant

Ewen Solon

Willowdale Captain

Brian Oulton

Holford

Howard Marion-Crawford

Wing Commander

Cyril Shaps

Miguel

Lee Montague

Miguel's Mate

John Lee

Flag Lt.

Terence Longdon

Lt Bailey

Alan Webb

British Consul

John Moffatt

Diver

Harold Siddons

Army Interrogation Officer

Jack May

Navy Doctor

Derren Nesbitt

Patrol Boat Officer

Yvonne Romain

Spanish Girl

Jerome Willis

Sailor