A String of DiamondsAdventure70A String of Diamonds70Adventurethumb_upthumb_downA String of DiamondsMarch 1, 1926Directed byFrank S. MattisonA dog helps to recover a million dollars worth of diamonds.US content warning german shepherddog hero Last Updated: November 6, 2025 Request Update CastFearless the DogFearlessJack MowerJohn LawsonLafe McKeeJ. Tiffany Van Den AkarKathryn McGuireVivian Van Den AkarTom LondonSlippery Jack ElmmMatty MattisonBurns ChristmasMax AsherMayor PotashDixie LamontGoldie PhalenAl AltReggie ConnelRobert McKenzieLawson's Associate (uncredited) Image Gallery