Yellowstone Cubs (film) Tuffy and Tubby, bear cubs of insatiable curiosity, are trapped during their investigation of a tourist’s car at Yellowstone Park. In attempting their rescue, their mother is branded a “dangerous bear,” and is taken to the outskirts of the park. By the time she finds her mischievous progeny they have just about the whole park in an uproar. Produced by Charles Draper. Released on June 13, 1963. 48 min. Released on video in 1986.