Sylvester alternates chasing the normal Tweety and fleeing a monster version of Tweety.
Mel Blanc
Sylvester / Tweety / Mr. Hyde / Two Cats (voice)
Friz Freleng
Director
Treg Brown
Editor
Virgil Ross
Animation
Gerry Chiniquy
Arthur Davis
Milt Franklyn
Original Music Composer
Sound Effects Editor