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