Scott Bakula plays Dr. Sam Becket in the scifi thriller "Quantum Leap".  

 Scott Bakula as Bobo the Nasa Chimp

He leaps from life to life trying to get home. It was a cool show and this one has a twist.

In the episode "The Wrong Stuff",  Sam leaps into the life of a NASA Chimp and for the entire show is wearing
a diaper!!!

This program airs next on the SCIFI channel on 9/20/04 at 11PM (Check your local listings)

Lets roll video tape on this one boys and girls!!!

Quantum Leap
SCIFI Sep 20 11:00pm
Series/Sci-Fi/Fantasy, 60 Mins.
"The Wrong Stuff: January 24, 1961", Episode #67308.
As a NASA research chimpanzee, Sam faces being yanked from the
program and a dubious fate.

Cast: Scott Bakula, Dean Stockwell, Caroline Goodall, Gary Swanson,
Albert Stratton, Kim Robillard, Peter Murnik.
Director(s): Joe Napolitano.
Producer(s): Donald P. Bellisario, Deborah Pratt, Michael Zinberg,
Paul Brown, Jeff Gourson, Chris Ruppenthal, Tommy Thompson.
Writer(s): Paul Brown.

Original Airdate: November 6, 1991.

Quotes from the program:

Dr. Ashton: "Let's change that diaper."
[Sam struggles]
Sam: "I have a Noble prize in physics and I'm struggling to keep my
diaper on."
Al: [about the monkey treats]: "How does it taste?"
Sam: "Have you ever eaten a catbox?"

Al [as Sam drinks the juice and makes a face]: "What's wrong?"
[Sam wriggles finger]
Al: "Caterpillars again?


Speaking of Scott Bakula: