8:30 p.m., CBSJenna Elfman) hires a nurse (guest star Olivia Munn) to help her prepare for the baby—but she doesn't tell Zack (Jon Foster).
9 p.m., CBSForest Whitaker guest stars as the team investigates the murders of homeless men in San Francisco.
10 p.m., COMEDY
10 p.m., USAMary McCormack) and Marshall (Frederick Weller) come in contact with the witnesses from their first case together, prompting Mary to flash back and tell the story of how she joined Witsec.
11 p.m., COMEDYSteve Carell.
11:30 p.m., COMEDY
Also on the airwaves...
The New Adventures of Old Christine, 8 p.m., CBS
Human Target, 8 p.m., FOX
Minute to Win It, 8 p.m., NBC
America's Next Top Model, 8 p.m., CW
American Idol, 9 p.m., FOX
Fly Girls, 9 p.m., CW
MythBusters, 9 p.m., DSC
High Society, 9:30 p.m., CW
Ugly Betty, 10 p.m., ABC
CSI: NY, 10 p.m., CBS
Law and Order: SVU, 10 p.m., NBC
Dog the Bounty Hunter, 10 p.m., A&E;
Shear Genius, Season 3 finale, 10 p.m., BRAVO
Ugly Americans, 10:30 p.m., COMEDY
Top Chef Masters, Season 2 premiere, 11 p.m., BRAVO
NBA Basketball: Jazz v. Rockets, Spurs v. Suns
MLB Baseball: Yankees v. Red Sox, Indians v. White Sox
NHL Hockey: Maple Leafs v. Rangers
What are you watching tonight?
Follow TV.com writer Stefanie Lee on Twitter: @StefAtTVDotCom