Seth Green

Enjoying animation: Seth Green ("Buffy the Vampire Slayer") not only has a hit on the Cartoon Network with "Robot Chicken," he also stars in "Four Kings," a midseason comedy on NBC.

Not surprisingly, he said, in what little time he has to spare, he watches all the Adult Swim shows on Cartoon Network.

He said it took just five days to animate each of the first 20 episodes of "Robot Chicken."

"We negotiated to get a six-day schedule this year," he said. "We’ll have 20 more episodes for the second season (which debuts next spring). They want us to eventually do 150."