Doctor

Pieter Eugene (7 episodes)

Boatman

Gavin

Mr. Williams

Dean Cornwallis

Mike

Norris

Derek (1 episode)

Derek

Charles Grieg

David Simmonds

Howard Bailey (1 episode)

Max Winter

Dr. Maxim Howarth (7 episodes)

Maxim Howarth (6 episodes)

Major Minnies

Saul Enderby (2 episodes)

Major Orde Wingate

Major Glendinning

David

Alan Montforce

The Major

Mr. Green

Thomas Balfour

Richard Hannay

Elliott McQueen

Orde Wingate

Bellamy

Bellamy (1 episode)

David (1 episode)

Maj. Glendinning (1 episode)

Deeley

Edward

John Slattery

Kaiser Wilhelm II (13 episodes)

Donald Trenton (2 episodes)

Commissaris Simon "Piet" Van der Valk (32 episodes)

Robert Rusk

Gerald Gurney-Stuart (1 episode)

Dr. Carson (1 episode)

Tim O'Leary

Sqd. Leader Edwards

Chris

Gerry Henderson

Addison Steele

Frank

Joe Thompson

Robert Driscoll (4 episodes)

Bellamy

Dan Sankey (1 episode)

Squadron-Leader Phil Osborne (1 episode)

Lt. Webb

Dave Hollis

(1 episode)

Richard

Tom Brewster (1 episode)

(1 episode)

US Marshal

Edgar Malone

Cpl. Matheson

Vincent

Don R

Petty Officer McCarthy

Bill Roper - Capt. Bell's Messenger, HMS Exeter

Trooper Bates (1 episode)

Supply Assistant Brooker (1 episode)

First Sailor at Dance