Class reunion
"Glee" celebrates its 100th episode with past and current members of New Directions reuniting to catch up, re-imagine old musical numbers and wax nostalgic about when the show mattered. Look for guest appearances from Dianna Agron and Kristin Chenoweth. 7 p.m. KMSP, Ch. 9
Heroic efforts
Since Disney owns ABC and Marvel Comics, it makes perfect sense to dedicate an hour of prime time to "Marvel Studios: Assembling a Universe," which could turn out to be a fantastic way to get sneak peeks at the upcoming movies on Captain America and the Avengers. It also sounds an awful lot like a glossy infomercial. 7 p.m. KSTP, Ch. 5
The chase is on
"Chasing Maria Menounos" turns the cameras on the TV reporter, who's slowly becoming more famous than the people she covers. On the season premiere, Menounos attends a luau with Derek Hough, Perez Hilton and Khloe Kardashian. One person's idea of a party is another person's idea of a nightmare. 9 p.m. Oxygen
Neal Justin
