Chief Det. Supt. Tom Lockhart / Detective Chief Superintendent Tom Lockhart / Chief Det. Supt. Lockhart (20 episodes, 1959)
Chief Superintendent Carr (4 episodes, 1959-1961)
Inspector Nicholson (3 episodes, 1959-1961)
(2 episodes, 1959-1961)
P.C. Harris (2 episodes, 1959-1961)
(2 episodes, 1959)
P.C. Gittings (2 episodes, 1959)
(1 episode, 1959)
Bobby Latham (1 episode, 1959)
Hilda Maclean (1 episode, 1959)
Inspector Clarke (1 episode, 1959)
Gerald Abbott (1 episode, 1959)
Alfred the Porter (1 episode, 1959)
Inspector (1 episode, 1959)
Carol Betterton (1 episode, 1959)
Mr. Abercrombie (1 episode, 1959)
Major Lucas (1 episode, 1959)
Hector Grey (1 episode, 1959)
Joe Sinclair (1 episode, 1959)
Susan Baylis (1 episode, 1959)
Lionel Drake (1 episode, 1959)
Skinner (1 episode, 1959)
Waites (1 episode, 1959)
Dorothy Stratton (1 episode, 1959)
Waiter (1 episode, 1959)
Barmaid (1 episode, 1959)
Page Boy (1 episode, 1959)
(1 episode, 1961)