This is how we do it in Canada.
8 p.m., CBS
How I Met Your Mother
Barney (Neil Patrick Harris) uncovers another gem from Robin's (Cobie Smulders) past—apparently Robin Sparkles once starred on a Canadian kids' show called Space Teens with another pop idol, Jessica Glitter (Nicole Scherzinger).8 p.m., NBC
Chuck
Chuck (Zachary Levi) tries to impress Sarah (Yvonne Strahovski) by taking on a dangerous assignment with an over-zealous agent, played by guest star Rob Riggle. Meanwhile, the Buy More employees try to figure out Greta's true identity. Summer Glau and Richard Chamberlin also guest star.9 p.m., CW
Gossip Girl
No season of Gossip Girl would be complete without a masquerade ball! This year, Chuck (Ed Westwick) hosts the crazy party at his apartment, and Serena's (Blake Lively) weird behavior stumps Dan (Penn Badgley) and Nate (Chace Crawford).10 p.m., CBS
Hawaii Five-0
The Five-0 team is assigned to protect a dictator who visits the islands and becomes the target of an assassin—but things get messy when one of the dictator's security guards is found dead.Season 1 finale, 10 p.m., SHO
The Big C
Cathy (Laura Linney) must come to terms with her diagnosis after Dr. Todd (Reid Scott) reveals that the bee treatments aren't working. Plus, Sean (John Benjamin Hickey) and Rebecca (Cynthia Nixon) reconnect over a shared secret.
Also on the airwaves...
Dancing with the Stars, 8 p.m., ABC
House, 8 p.m., FOX
90210, 8 p.m., CW
Rules of Engagement, 8:30 p.m., CBS
Two and a Half Men, 9 p.m., CBS
Lie to Me, 9 p.m., FOX
The Event, 9 p.m., NBC
In Treatment, 9 & 9:30 p.m., HBO
Cake Boss, 9 p.m., TLC
Mike & Molly, 9:30 p.m., CBS
Castle, 10 p.m., ABC
Chase, 10 p.m., NBC
Hoarders, 10 p.m., A&E;
Weeds, Season 6 finale, 10 p.m., SHO
Bret Michaels: Life As I Know It, 10 p.m., VH1
Mario Lopez: Saved by the Baby, 10:30 p.m., VH1
NFL Football: Eagles v. Redskins
NHL Hockey: Blues v. Avalanche
NCAA Basketball: Pepperdine v. UCLA, Siena v. Minnesota, Hampton v. Wake Forest
What are you watching tonight?
Follow TV.com writer Stefanie Lee on Twitter: @StefAtTVDotCom
PARKS AND REC COMES BACK JAN. 20TH!
House, Two and a half men, Hawaii 5-0, Chuck, and The Event
House, Two and a Half Men and Castle.
HIMYM, Chuck, Gossip Girl, Mike & Molly, Castle, The Event, Hawaii Five-0, The Big C, and 90210
waiting only for a chuck
How I Met Your Mother,Hawaii Five-0.House,90210, Two and a Half Men, Lie to Me, Mike & Molly, Castle,Weeds,
Hawaii Five-0, Castle, Lie to Me, The Event and Chuck (yay for Summer Glau back on tv!!!)
5-O, HIMYM, Chuck and Gossip Girl
House, The Event and Weeds.
Summer Glau back on TV (even if it is on Chuck, ug - maybe the ptb will have her give Morgan a slap). Can't wait. :)
Chuck, Castle, Hawai 5-0, Lie to Me. :)
CHuck, Castle, Weeds. No more House for me. I'll watch it later.BTW: tonight episode of weeds is t he season finale...why is not a big deal?
Gossip Girl,90210,Weeds,Chuck,HIMYM
House and Mike & Molly.
Chuck, The Event, Castle, Hawaii 5-0, Mike & Molly (hopefully, CBS will have the episodes online soon), etc...
HIMYM, Gossip Girl, Lie to Me, Castle.
hawaii five-0, house, lie to me, castle, weeds
House, The Event
How I Met Your Mother,Hawaii Five-0,House,90210, Two and a Half Men,Lie to Me, Mike & Molly, Castle, Weeds. sweet
The Event, Weeds, Eagles vs Redskins,etc
Chuck, DWTS, Castle, and Hawaii Five-0
if you'r gonna watch Chuck, please what it live...please?
Chuck, Castle
Hawaii Five-0, Castle and the Battle of the Blades results...
Chuck, & Castle.