Former 'Saturday Night Live' cast members Chris Parnell and Horatio Sanz have joined a new sitcom starring Jon Heder (of 'Napoleon Dynamite'), which is to start shooting at the end of the month for Comedy Central. The show, in which Heder plays a loser searching for some as-yet unidentified dream from his parents' couch ('Get A Life,' anyone?), already has writers/producers Will Ferrell, Adam McKay, and Chris Henchy aboard.

Parnell will play a "burned-out high school teacher," and Sanz as an ex-convict, both friends of Heder's character, whom he enlists to help with said unidentified dream, which somehow involves saving their home town of "Big Lake" (no word where that is). The show is set to premiere sometime this fall.

Hopefully, the sitcom won't prevent Parnell from appearing on '30 Rock' as Dr. Spaceman (pronounced "spuhcheman"), one of the show's more interesting cameos. And we'll get to see what Sanz looks like when he's not trying to keep himself from laughing.