Rin Tin Tin stars along with Walter Miller and June Marlowe in this thrilling Mascot serial, as the resourceful canine comes to the aid of a mysterious man searching for the killers of two mine owners, as well as an outlaw known as "the Cactus Kid." With Josef Swickard, Buzz Barton, Lee Shumway. 12 chapters; 3 1/3 hrs. Standard; Soundtrack: English.