Glee (9:00 p.m. EST, FOX)

Neil Patrick Harris guest stars on tonight’s episode, so you know it’s going to be hilarious! Will’s (Matthew Morrison) high school rival (Neil Patrick Harris) comes on the scene and stirs up trouble for the glee club. Elsewhere, Rachel (Lea Michele) tries to deal with a personal issue that’s been going on for a while, and Artie’s (Kevin McHale) dream leads him on an adventure.

Lost (9:00 p.m. EST, ABC)

The group traveling with Jack (Matthew Fox) goes looking for Desmond (Henry Ian Cusick), which (if you don’t remember) could be dead or alive. Meanwhile, Locke (Terry O’Quinn) comes up with a new plan of action. Bad news—Michelle Rodriguez is in this episode as Ana Lucia.

I really hated that character. But I guess I can deal with her if we get closer to getting some answers.

The Hills (10:00 p.m. EST, MTV)

I hate pretty much everyone on this show, but I just can’t stay away from it! On tonight’s episode, Heidi and Spencer’s unpredictable behavior causes their family and friends to make a tough decision. Meanwhile, Ryan stands up Audrina; and Brody and Kristin decide to bring their relationship to the next level.