Kerwin Mathews

Jonathon Standing

Christopher Lee

Captain LaRoche

Andrew Keir

Jason Standing

Glenn Corbett

Henry

Michael Ripper

First Mate Mack

Peter Arne

Bosu'n Hench

Marla Landi

Bess Standing

Oliver Reed

Pirate Brocaire

Marie Devereux

Maggie Mason (uncredited)

Jerold Wells

Penal Colony Master

Dennis Waterman

Timothy Blackthorne, the boy

Desmond Llewelyn

Tom Blackthorne

David Lodge

Smith

Jack Stewart

Godfrey Mason

Michael Peake

Kemp

Emile Stemmler

A villager (uncredited)

Bert Simms

Old Townsman (uncredited)

Denis Shaw

Silver (uncredited)

John Roden

2nd Settler (uncredited)

Ernie Rice

Pirate (uncredited)

Keith Pyott

Silas (uncredited)

Dido Plumb

Prisoner (uncredited)

Michael Peake

Kemp (uncredited)

Michael Mulcaster

Martin (uncredited)

Desmond Llewelyn

Tom Blackthorne (uncredited)

Don Levy

Carlos (uncredited)

George Hilsdon

Penal Colony Guard (uncredited)

John Collin

Lance (uncredited)

Bill Brandon

Pirate (uncredited)

Jim Brady

Pirate (uncredited)

Ronald Blackman

Pugh (uncredited)

Richard Bennett

Seymour (uncredited)

John Bennett

Penal Colony Guard (uncredited)

Diane Aubrey

Margaret Blackthorne (uncredited)