Bill Plympton Discusses his "Surreal Gags."

Terry Gilliam's new film, The Imaginarium of Doctor Parnassus, is another entry into his long line of dream-like films. But it's also the final performance of the late Heath Ledger. Gilliam joins host Terry Gross to talk about the personal and professional challenges of creative filmmaking.

Animation director J.J. Sedelmaier is the animator of the TV Funhouse skits which run on Saturday Night Live. They include The Ambiguously Gay Duo, Fun with Real Audio, and The X-Presidents. Sedelmaier and his animation company work on many other projects for TV and commercials. They have worked for MTV and Nickelodeon. He also has his own Cartoon Network series, Capt. Linger.

Park's short, claymation film, "Creature Comforts," won this year's Oscar for Best Animation. It's a five-minute parody of a documentary in which various zoo animals tell the camera how they feel about their living conditions.