Jon Pertwee

The Doctor (archive footage)

Katy Manning

Jo Grant (archive footage)

Roger Delgado

The Master (archive footage)

Clive Morton

Colonel George Trenchard (archive footage)

Edwin Richfield

Captain John Hart (archive footage)

Royston Tickner

Robbins (archive footage)

Donald Sumpter

Commander Ridgeway (archive footage)

David Griffin

Lt. Commander Mitchell (archive footaage)

June Murphy

3rd Officer Jane Blythe (archive footage)

John Caesar

C.P.O Myers (archive footage)

Eric Mason

C.P.O Smedley (archive footage)

Colin Bell

C.P.O Summers (archive footage)

Alec Wallis

LDG. Telegraphist Bowman (archive footage)

Christopher Wray

LDG. Seaman Lovell (archive footage)

Norman Atkyns

Rear Admiral (archive footage)

Martin Boddey

P.P.S. Walker (archive footage)

Declan Mulholland

Clark (archive footage)

Hugh Futcher

Hickman (archive footage)

Terry Walsh

Castle Guard Barclay (archive footage)

Stanley McGeagh

Castle Guard Drew (archive footage)

Peter Forbes-Robertson

Chief Sea Devil (archive footage)

Pat Gorman

Sea Devil (archive footage)

Stuart Fell

Stunt Sea Devil (archive footage)

Nicholas Briggs

Sea Devil (voice)