Sylvester alternates chasing the normal Tweety and fleeing a monster version of Tweety.





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Complete credited cast:
Sylvester / Tweety / Mr. Hyde / Two Cats (voice)


Sylvester Cat sleeps on the ledge outside the high-rise lab of Dr. Jekyll. He dreams that Tweety Bird is exposed to the infamous Hyde formula, which repeatedly changes the little canary into a monstrous, prehistoric bird of prey that chases him around the building. Written by Kevin McCorry <>

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Release Date:

14 May 1960 (USA)  »

Also Known As:

O Belo E o Fero  »

Company Credits

Production Co:

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Technical Specs


Sound Mix:



Aspect Ratio:

1.37 : 1
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Did You Know?


The title makes reference to the novel 'The Strange Case of Dr Jekyll and Mr Hyde' by Robert Louis Stevenson. One of several uses of this story by the Warner Brothers animation department. See more »


Spoofs Dr. Jekyll and Mr. Hyde (1912) See more »


A Cup of Coffee, a Sandwich and You
Music by Joseph Meyer
Played when Sylvester makes the sandwich
See more »

Frequently Asked Questions

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User Reviews

"Just being a pussycat is a constant hazard."
8 October 2015 | by (USA) – See all my reviews

Tweety, on the run from Sylvester, jumps into a bottle of Dr. Jekyll's Hyde formula and changes into one of the scariest cartoon birds I've ever seen. A funny short from Friz Freleng that is yet another cartoon take on Dr. Jekyll and Mr. Hyde. It may have been done before but this is still very enjoyable. Every time Tweety changes into that thing and poor Sylvester gets scared, you'll find yourself laughing. Great music from Milt Franklyn. Wonderful voice work from the incomparable Mel Blanc. The animation is nice and colorful with well-drawn characters and backgrounds. Pretty fun stuff. The Hyde Tweety alone makes it worth a look. My only complaint is that I didn't like the ending much.

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