(7 p.m., NBC/Ch. 5): The gang gets animated in the vein of ''G.I. Joe.''
Hell's Kitchen(7 p.m., Fox/Ch. 13): The contestants have to make lobster ravioli.
Under the Gunn (7 and 11 p.m., Lifetime): The designers have to draw inspiration from superheroes.
The Millers (7:30 p.m., CBS/Ch. 2): Nathan tries to befriend a co-worker.
Parks and Recreation (7:30 p.m., NBC/Ch. 5): Leslie helps organize the senior prom.
Two and a Half Men (8 p.m., CBS/Ch. 2): Walden's ex-girlfriend invites him to her boutique opening.
Grey's Anatomy (8 p.m., ABC/Ch. 4): A flu outbreak hits the hospital - including the doctors.
Hollywood Game Night (8 p.m., NBC/Ch. 5): Jenna Elfman, Donald Faison, Bob Harper, Ellie Kemper, Joel Madden and Molly Shannon are the celebrity guests.
American Idol (8 p.m., Fox/Ch. 13): Contestants face elimination.
The Crazy Ones (8:30 p.m., CBS/Ch. 2): Zach promises he can get Brad Paisley to sing a jingle.
Surviving Jack (8:30 p.m., NBC/Ch. 5): Frankie, George and Mikey ask Jack to coach them for baseball tryouts.
Elementary (9 p.m., CBS/Ch. 2): A serial killer famous for biting his victims appears to have returned from the dead.
Scandal (9 p.m., ABC/Ch. 4): Abby takes on Olivia's duties at the White House.
Parenthood (9 p.m., NBC/Ch. 5): Zeek and Camille finally decide what to do about the house.
Vikings (11 p.m., History): King Horik returns to Kattegat with a surprising proposition for Ragnar.