Cast 6
John Stephenson
Blubber Bear (voice) (34 episodes)
Paul Winchell
Clyde (voice) (34 episodes)
Don Messick
Gravel Slag (voice) (34 episodes)
Daws Butler
Big Gruesome (voice) (34 episodes)
Janet Waldo
Penelope Pitstop (voice) (34 episodes)
Dave Willock
Narrator (34 episodes)
Production 2
Joseph Barbera
Producer (34 episodes)
William Hanna
Producer (34 episodes)