Burn 'Em Up O'Connor

Jerry O'Connor

Jane Delano

Buddy Buttle

P.G. Delano

Ed Eberhart

Doc Heath

Jose "Rocks" Rivera

Hank Hogan

Lefty Simmons

Tim McKelvy

Jim Nixon

Jenkins

Hospital Interne (as Jack Carlton)

Woman in Movie House (uncredited)

Susan, Laboratory Analyst (uncredited)