Richard Harris as Lt. Cmdr. Anthony Fallon

Omar Sharif as Captain Alex Brunel

David Hemmings as Charlie Braddock

Anthony Hopkins as Supt. John McCleod

Shirley Knight as Barbara Banister

Ian Holm as Nicholas Porter

Clifton James as Corrigan

Roy Kinnear as Social Director Curtain

Caroline Mortimer as Susan McCleod

Mark Burns as Hollingworth

John Stride as Hughes

Freddie Jones as Sidney Buckland

Julian Glover as Cmdr. Marder

Jack Watson as Chief Engineer Malicent

Roshan Seth as Azad

Kenneth Colley as Detective Brown

Andy Bradford as 3rd Officer Jim Hardy

Paul Antrim as Digby

Ben Aris as The Walker

John Bindon as Driscoll

Adam Bridge as David McLeod

Rebecca Bridge as Nancy McLeod

Tom Chadbon as Juggernaut's Contact

Kenneth Cope as Bridgeman

Michael Egan as Mr. Fowlers

Freddie Fletcher as 2nd Radio Officer

Terence Hillyer as Menzies

Barnaby Holm as Christopher Porter

Kristine Howarth as Mrs. Buckland

Victor Lucas as Detective

Paul Luty as Clerk

Simon MacCorkindale as No. 1 Helmsman

Michael Melia as Navigator

Richard Moore as Junior Officer

Rosamund Nelson as Clerk at the Air Terminal

Doris Nolan as Mrs. Corrigan

John Pennington as Passenger

David Purcell as 1st Detective

Martyn Read as Kelsey

Liza Ross as Laura Kellogg

Bob Sessions as Jerry Kellogg

Howard Southern as Detective Skinner

Ian Talbot as Naval Technician

Colin Thatcher as Henning

Gareth Thomas as Liverpool Joiner

Cyril Cusack as Major O'Neill

Michael Hordern as Mr. Baker

Eric Mason as 2nd Detective