Neil Hamilton
— Donald Kilgore
Sheila Terry
— Paula Nyberg
Arthur Byron
— Conductor Clark
Guy Kibbee
— Railway Detective McDuff
Dudley Digges
— Professor Axel Nyberg
Arthur Hohl
— Wallace Myton
Allen Jenkins
— Robert 'Rusty' Griffith
Harold Huber
— Train Guard Craft
G. Pat Collins
— Train Guard Harry Burns
Robert Barrat
— Mr. Calhoun, Attorney
Vernon Steele
— Dr. Harold Rolph
Ivan F. Simpson
— Johnson, Kilgore's Secretary