The Backyardigans

Caveman’s Best Friend (3x14)

Air date: Sep 23, 2008

Austin sets out in search of his lost new dinosaur that he bought from Uniqua in the stone-age town of Rockville. Austin soon learns that the only way to retrieve him is to whistle except he can't, neither can Fireman Tyrone or Cop Pablo. Can they save the dinosaur before its too late?