Tom Hood

Frank Albertson

Bob Collins

Ernie Nevers

Spike

Edmund Cobb

Joe

Joe Bonomo

Lefty

George Magrill

Prof. Wilson

Harold Nelson

Henchman

George DeNormand

Steele [Ch. 1]

William Gould

One of Bob's College Pals

Reb Russell

Maitre d', Red Lantern Cafe [Ch. 3]

Larry Steers

Eddie, Waiter at Red Lantern Cafe [Ch. 3]

Harry Strang

Betty Moore

Cecilia Parker

Botter Hood

Francis Ford

Sam Slater

J. Frank Glendon

Horace Moore

Frank Beal

Kate Bland

Caryl Lincoln

Dirk / Detective Dane

Tom London

Gavin

Al Ferguson

Doran

Jack Rube Clifford

Story

Arthur Conan Doyle

Director

Henry MacRae