Raymond Francis Raymond Francis
plays Chief Det. Supt. Tom Lockhart
Johnny Briggs Johnny Briggs
plays Det. Sgt. Russell
Eric Lander Eric Lander
plays Det. Sgt. Harry Baxter
Frank Forsyth Frank Forsyth
plays Doctor
Ernest Hare Ernest Hare
plays Commander Drew
Nicholas Grimshaw Nicholas Grimshaw
plays Doctor (2)
Robert Pitt Robert Pitt
plays Police Constable
 

Writers

Bill Strutton
18 episodes, writer
Paddy Manning O'Brine
12 episodes, writer
Colin Holder
11 episodes, story
10 episodes, writer
Glyn Davies (II)
9 episodes, writer
Bill Hitchcock (II)
9 episodes, writer
Alun Falconer
8 episodes, writer
James Kelley
6 episodes, as James Kelly
6 episodes, writer
William Woods
6 episodes, writer
Peter Miller (VI)
6 episodes, writer
5 episodes, writer
Michael Ashe (II)
5 episodes, writer
Guy Morgan (II)
5 episodes, writer
Terence Feely
5 episodes, writer
Donald James
4 episodes, writer
4 episodes, writer
Martin Worth
4 episodes, writer
Mike Watts
4 episodes, writer
Anthony Skene
4 episodes, writer

Directors

Richard Sidwell
75 episodes
Ian Fordyce
35 episodes
Adrian Cooper (II)
26 episodes
James Ormerod
23 episodes
23 episodes
Bill Hitchcock (II)
23 episodes
Richard Doubleday
18 episodes
Geoffrey Hughes (III)
16 episodes
Bill Morton
15 episodes
Peter Croft
11 episodes
Michael Westmore (II)
9 episodes
Cyril Coke
8 episodes
John Frankau
7 episodes
Don Gale
6 episodes
Richard Gilbert (II)
6 episodes
Marc Miller
6 episodes
Michael Currer-Briggs
6 episodes
Ronald Marriott
5 episodes
Jonathan Alwyn
4 episodes
Richard West (VI)
4 episodes

Producers

Ray Dicks
77 episodes, producer
Peter Willes
59 episodes, producer
Johnny Goodman
46 episodes, producer
Geoffrey Nugus
26 episodes, producer
Michael Currer-Briggs
14 episodes, producer
Richard Matthews
10 episodes, producer