John Gregson

as Bill Kirby (6 episodes)

as (voice)

as Narrator

as Det. Supt. Price (1 episode)

as Narrator (voice)

as Sven Ericsson (1 episode)

as Dennis Croft (17 episodes)

as Dr. Cordell

as Charles Ashton

as Mijnheer Brinker

as Comm. Malcolm Stevenson (1 episode)

as Det-Insp Conway

as Bob Kinsale (1 episode)

as Colonel Sandauer

as Paul Harford (1 episode), as Jack (1 episode)

as Commander George Gideon (26 episodes)

as Colonel Ballin (1 episode)

as Inspector Parnell

as Colonel Roberts (1 episode)

as British Padre

as Callendar

as Butler

as Det. Insp. Sayers

as Smith