Rin-Tin-Tin brings the killer of his mistress to justice.
Rin-Tin-Tin Jr.
Rin-Tin-Tin
Regis Toomey
Bob Franklin, alias Rocky Morgan
Jack Mulhall
Border Patrolman Ed
Molly O'Day
Ann Norton
Jack Mower
King
Lois January
Barbara Franklin
James Murray
Matt
John Elliott
John Norton
Tom London
Henchman Jennings
Milburn Morante
Dad Miller
