Desc: The Wolf Dog: Directed by Colbert Clark, Harry L. Fraser. With Rin Tin Tin Jr., George J. Lewis, Boots Mallory, Frankie Darro. Frank Courtney is the heir to great wealth, but his guardian Norman Bryan secretly plots to do the boy in and steal the inheritance. Only Frank's friend, radio operator Bob Whitlock, and Frank's wolf-dog stand between him and disaster.