Cast
👤
John Gabriel
John Armitage (1951-1953)
Richard Pearson
Professor Watkins (First series only)
Valentine Dyall
Gorgol (2nd series only)
Peter Hawkins
Petrio (Second series only)
👤
Brian Smith
Ian Spencer
Bruce Beeby
Delpho (First series only)
👤
Humphrey Lestocq
Self
Self (Introduced each episode)
👤
Betty Woolfe
Mrs. Spencer (First series only)
👤
Michael Newell
Bilaphodorous
👤
Isabel George
Pamela Vernon (First series only)