Geoffrey (6 episodes)

Sir George Crofts

DCI Callum Lockhart (1 episode)

Robert Davies (6 episodes)

Michael (1 episode)

Robert Davies (6 episodes)

Indigo Jeremy (1 episode)

Piers Morgan (3 episodes)

Tony Conroy (4 episodes)

Gavin Daly (1 episode)

DI Kevin Salisbury (6 episodes)

Martin Copeland (8 episodes)

Roy Garrett

Thomas Edison (1 episode)

Ned Chambers

Self - Narrator (40 episodes)

Colonel

The Colonel

Albert White

Brigadier Wainwright (7 episodes)

Bobby Day (8 episodes)

Duke of Lorraine (2 episodes)

DCC Chapman (2 episodes)

Robert

Owen Preece (1 episode)

DI Frank Williams (2 episodes)

Phil Porter (8 episodes)

Father Brophy (1 episode)

Ted Shrimpton

Detective Superintendent John Bennett (2 episodes)

Frankie (1 episode)

D.S. Jimmy Valentine / Narrator (1 episode)

Narrator (voice) (uncredited) (2 episodes)

Dr. Holland

Empton (1 episode)

(6 episodes)

Farmer

Samuel Selby

Home Secretary (14 episodes)

Nicholas Blake (1 episode)

Dave Searle (6 episodes)

Frank Thompson

Frank Thompson (2 episodes)

Ashley Morgan (48 episodes)

Clive Stevenson (6 episodes)

The Controller

Gerhardt

Anton Drexler (2 episodes)

DI Clive Wilson (2 episodes)

Robert Weldon (4 episodes)

Oliver Langley (1 episode)

Capt. Townsend

Count Malevsky

John Field (1 episode)

Earl of Warwick

(2 episodes)

Det Sgt Terrence Reid (2 episodes)

Stephen 'Squeal' Blake

Charles Sheldon (1 episode)

Aristophanes

Captain Harvile

Chris Hughes (1 episode)

Clive Pendle (1 episode)

DCI Fields (1 episode)

Jeremy

Colour Sergeant Ian Anderson (7 episodes)

Duncan (1 episode)

Keith

(1 episode)

Harry

Peter

Salateen (4 episodes)

Jurek Borowczak

Billy

Steve Webber (19 episodes)

Lorenzo (1 episode)