- Leslie Charteris
- (by) (118 episodes, 1962-1969)
- Leslie Charteris
- (original story) (46 episodes, 1962-1969)
- Leslie Charteris
- (adapted from an original story by) (3 episodes, 1966)
- Leslie Charteris
- (adapted from the original story by) (2 episodes, 1966)
- Leslie Charteris
- (adapted from: "Arizona") (1 episode, 1965)
- Leslie Charteris
- (adapted from: "The Case of the Frightened Inn-keeper") (1 episode, 1965)
- Leslie Charteris
- (adapted from: "The Gold Standard") (1 episode, 1965)
- Leslie Charteris
- (adapted from: "The Man From St. Louis") (1 episode, 1965)
- Leslie Charteris
- (adapted from: "The Masked Angel") (1 episode, 1965)
- Leslie Charteris
- (adapted from: "The National Debt") (1 episode, 1965)
- Leslie Charteris
- (adapted from: "The Questing Tycoon") (1 episode, 1965)
- Leslie Charteris
- (adapted from: "The Unlicensed Victuallers") (1 episode, 1964)
- Leslie Charteris
- (novel) (1 episode, 1964)
- Leslie Charteris
- (original story: "Hollywood") (1 episode, 1963)
- Leslie Charteris
- (original story: "The Beauty Specialist") (1 episode, 1963)
- Leslie Charteris
- (original story: "The Black Market") (1 episode, 1963)
- Leslie Charteris
- (original story: "The Impossible Crime") (1 episode, 1965)
- Leslie Charteris
- (original story: "The Inland Revenue") (1 episode, 1964)
- Leslie Charteris
- (original story: "The Sizzling Saboteur") (1 episode, 1963)
- Leslie Charteris
- (original story: "The Spanish War") (1 episode, 1963)
- Harry W. Junkin
- (screenplay by) (10 episodes, 1963-1967)
- Harry W. Junkin
- (screenplay) (10 episodes, 1966-1969)
- Terry Nation
- (screenplay) (14 episodes, 1964-1968)
- John Kruse
- (screenplay) (7 episodes, 1967-1969)
- John Kruse
- (screenplay by) (5 episodes, 1963-1967)
- John Kruse
- (story) (2 episodes, 1968)
- John Kruse
- (story by) (1 episode, 1967)
- Michael Cramoy
- (screenplay by) (3 episodes, 1965)
- Michael Cramoy
- (story) (1 episode, 1966)
- Michael Cramoy
- (writer) (1 episode, 1969)
- Leigh Vance
- (screenplay) (3 episodes, 1966)
- Leigh Vance
- (screenplay by) (2 episodes, 1967)
- Norman Borisoff
- (screenplay by) (4 episodes, 1962-1964)
- John Graeme
- (screenplay by) (4 episodes, 1963-1964)
- Norman Hudis
- (screenplay by) (4 episodes, 1964-1965)
- Gerald Kelsey
- (screenplay by) (3 episodes, 1962)
- Dick Sharples
- (screenplay by) (3 episodes, 1962)
- Paddy Manning O'Brine
- (screenplay by) (2 episodes, 1964-1965)
- Paddy Manning O'Brine
- (screenplay) (1 episode, 1966)
- Paul Erickson
- (screenplay by) (3 episodes, 1964)
- Brian Degas
- (screenplay by) (3 episodes, 1965)
- Michael Winder
- (screenplay) (2 episodes, 1966-1968)
- Michael Winder
- (screenplay by) (1 episode, 1967)
- Michael Pertwee
- (screenplay by) (2 episodes, 1967)
- Michael Pertwee
- (screenplay) (1 episode, 1967)
- Donald James
- (screenplay) (3 episodes, 1968-1969)
- Lewis Davidson
- (screenplay by) (2 episodes, 1962-1963)
- John Gilling
- (screenplay) (2 episodes, 1962-1963)
- Richard Harris
- (screenplay by) (2 episodes, 1962)
- Robert Banks Stewart
- (screenplay by) (2 episodes, 1963-1964)
- Larry Forrester
- (screenplay by) (2 episodes, 1963)
- Bill Strutton
- (screenplay by) (1 episode, 1963)
- Bill Strutton
- (screenplay) (1 episode, 1963)
- John Stanton
- (screenplay) (2 episodes, 1966)
- Julian Bond
- (screenplay by) (1 episode, 1962)
- John Roddick
- (screenplay by) (1 episode, 1962)
- Jack Sanders
- (screenplay by) (1 episode, 1962)
- Leonard Grahame
- (screenplay by) (1 episode, 1963)
- Kenneth R. Hayles
- (screenplay by) (1 episode, 1963)
- Ian Kennedy Martin
- (screenplay by) (1 episode, 1963)
- Ian Stuart Black
- (screenplay by) (1 episode, 1964)
- Basil Dawson
- (screenplay by) (1 episode, 1964)
- Marcus Demian
- (screenplay by) (1 episode, 1964)
- Ronald Duncan
- (screenplay by) (1 episode, 1965)
- Jesse Lasky Jr.
- (screenplay by) (1 episode, 1965)
- Pat Lasky
- (screenplay by) (1 episode, 1965)
- Douglas Enefer
- (story) (1 episode, 1966)
- Terence Feely
- (screenplay) (1 episode, 1966)
- Roy Russell
- (screenplay) (1 episode, 1966)
- Alfred Shaughnessy
- (screenplay) (1 episode, 1966)
- Alfred Shaughnessy
- (story) (1 episode, 1966)
- Anthony Squire
- (story) (1 episode, 1966)
- Philip Broadley
- (screenplay by) (1 episode, 1967)
- Scott Forbes
- (screenplay by) (1 episode, 1967)
- Derek Ford
- (screenplay) (1 episode, 1967)
- Donald Ford
- (screenplay) (1 episode, 1967)
- Joe Morheim
- (screenplay) (1 episode, 1967)
- A. Sanford Wolfe
- (screenplay) (1 episode, 1967)
- Robert Holmes
- (screenplay) (1 episode, 1968)
- Ray Austin
- (script) (uncredited) (1 episode, 1968)
- Roger Moore
- (uncredited) (unknown episodes)