The Lone Defender 1930

Synopsis:

A prospector is murdered by The Cactus Kid and his gang, who hope to find the murdered man's goldmine. The miner's dog, Rin-Tin-Tin, recognizes the killers, who thereafter seek to use the dog to locate the lost mine. With the help of a government agent and a young girl, Rinty saves the mine and brings the bad guys to justice.

Directed by: Richard Thorpe
Written by: Harry L. Fraser & William P. Burt & Bennett Cohen
Runtime: 217 minutes
Cast:
Rin-Tin-Tin
Rin-Tin-Tin
Rinty 
Walter Miller
Walter Miller
Ramon 
June Marlowe
June Marlowe
Dolores Valdez 
Josef Swickard
Josef Swickard
Juan Valdez 
Buzz Barton
Buzz Barton
Buzz 
Lee Shumway
Lee Shumway
Amos Harkey