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