Sing Off (8pm, NBC) - It's like "American Idol" for a cappella groups, but hosted by Nick Lachey. North Carolina's Ben Folds (left) is one of the celebrity judges. The show continues on Tuesday and Wednesday nights, and the live finale is December 21.
How I Met Your Mother (8pm, CBS) - The gang tries to quit smoking and Harvey Fierstein provides Lily's smoking voice. Wait. They smoke? Since when?
Posse: Young Guns of the PBR (9pm, CMT) - A repeat of the CMT special about bull riders which features two from North Carolina.
The Closer (9pm, TNT) - Previous cases are reviewed when an LAPD crime lab is discredited. One of the cases belongs to Provenza and his old partner, played by guest star Beau Bridges. Here's the good part: Provenza's old partner George is now Georgette. Provenza's gonna love that.
Big Bang Theory (9:30pm, CBS) - Leonard's mother (Christine Baranski) visits, which pleases Sheldon, but upsets Leonard. When Sheldon is pleased, I am pleased.
Men of a Certain Age (10pm, TNT) - Owen (Andre Braugher) is humiliated at work when his father takes away his loaner sedan and makes him drive a sub-compact car as punishment for lackluster sales. Also, Joe contemplates moving out of the hotel into an apartment, and Terry plots revenge against a rude driver who almost ran him over.