Mystery of the Riverboat

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]

4.7

Flying Disc Man from Mars

6.0

Spy Smasher

5.0

Jungle Queen

Winners of the West

6.0

Federal Operator 99

7.0

Hawk of the Wilderness

4.0

Daredevils of the Red Circle

6.4

Flash Gordon

4.0

The Adventures of Dusty Bates

6.1

Drums of Fu Manchu

5.0

The Great Alaskan Mystery

3.8

The Great Adventures of Captain Kidd