Mystery of the Riverboat
Steve Langtry
Jenny Perrin
Rudolph Toller
Clayton
Capt. Ethan Perrin
Louis Schaber
Bruno Bloch
Batiste
Charles Langtry
Celeste Eltree [Chs. 1-4, 7]
Jug Jenks [Chs. 1-4, 7]
Chief Engineer [Chs. 1-4, 7]
Hermann Einreich [Chs. 1-2]
Craig Cassard [Ch. 1]
Dr. Hartman [Ch. 1]
Jean Duval [Ch. 5]
Police Chief F. E. Dumont [Chs. 6-8, 11]
Sawyer, the garage owner [Chs. 5, 10]
The Singer-Guitarist [Chs. 1-3, 13]
