Steve Langtry
Robert Lowery
Jenny Perrin
Marjorie Clements
Jug Jenks [Chs. 1-4, 7]
Eddie Quillan
Chief Engineer [Chs. 1-4, 7]
Alec Craig
Hermann Einreich [Chs. 1-2]
Ian Wolfe
Craig Cassard [Ch. 1]
Dick Curtis
Dr. Hartman [Ch. 1]
Byron Foulger
Jean Duval [Ch. 5]
Earle Hodgins
Police Chief F. E. Dumont [Chs. 6-8, 11]
Cy Kendall
Sawyer, the garage owner [Chs. 5, 10]
Ralph Sanford
The Singer-Guitarist [Chs. 1-3, 13]
Jimmie Dodd
Rudolph Toller
Lyle Talbot
Clayton
Arthur Hohl
Capt. Ethan Perrin
Oscar O'Shea
Louis Schaber
Joe Devlin
Bruno Bloch
Anthony Warde
Batiste
Francis McDonald
Charles Langtry
Eddy Waller
Celeste Eltree [Chs. 1-4, 7]
Marion Martin
Director
Lewis D. Collins
Ray Taylor
Story
Ande Lamb
Adaptation
Screenplay
Maurice Tombragel