"Vampire Diaries," 8 p.m. KFRE (Channel 59.1): The CW Network hasn't had a lot to brag about this TV season. But this teen angst/vampire series is one positive note. It's one of the few ratings hits for the network. That could have a lot to do with how fans were already primed for a teen vampire series because of "Twilight." "New Moon" fans might find it interesting that tonight's episode features a birthday celebration. Stefan (Paul Wesley) gets a surprise visit from on old friend (Arielle Kebble) to mark the special day. Elena (Nina Dobrev) is upset by Halloween events - and who wouldn't be upset just living in a town full of vampires - so she's trying to stay away from Stefan. Let's see how long that will last. If you have not been watching the series, take a chance and sink your teeth into an episode.