The fourth season of ”Buffy the Vampire Slayer” begins Tuesday night (WB, 8 p.m.), but don’t get too accustomed to Seth Green’s face. After shooting the first six episodes, the actor has left the series to take a film role, and it’s undecided whether he’ll return. An inside source tells EW Online that the show’s producers will wait to see where the storylines are headed without Green before committing to bringing back his character, Oz.
However, the WB and Green’s spokesperson both say the actor will return to Sunnydale once he’s back from Canada, where he’s currently shooting ”Knockaround Guys,” a dark comedy about mobsters’ sons costarring John Malkovich, Dennis Hopper, and ”Saving Private Ryan”’s Vin Diesel and Barry Pepper. Oz’s absence from the show will be explained, promises the WB, although no plot twists are being revealed. Since this season finds the Sunnydale High grads at college, maybe Oz will just go out on a very long beer run….