Fall TV: Old Faces, New ShowsMatthew Perry makes new friends! Lisa Whelchel learns the facts of Survivor! Slide to see which favorites are stepping back onto the small screen


Was a cast member of: Weeds
Now headlining: Animal Practice, premiered Sept. 26

There's nothing illegal going on here for Kirk, whose turn as NBC's animal-loving veterinarian Dr. George Coleman is quite a departure from his comedic tenure on Showtime's marijuana-fueled comedy. In his new gig, Kirk shares the spotlight with The Hangover's Crystal the monkey, who rakes in $12,000 an episode.

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