Director: Joseph Barbera, William Hanna
Producer: William Hanna, Joseph Barbera
Loopy unknowingly befriends a scientist who turns into a monster on and off without Loopy knowing that the monster is really him.
7 min
Rating: 0/10
Released
Top Cast
Daws Butler
Loopy De Loop (voice)
Hal Smith
Elderly Woman / Mr. Hyde (voice)
Don Messick
Car Owner / Dr. Jekyll (voice)
Movie Info
Director: Joseph Barbera, William Hanna
Producer: William Hanna, Joseph Barbera
Production Companies: Hanna-Barbera Productions
Countries: United States of America