8 p.m., CBSAlyson Hannigan) doesn't believe that Marshall's (Jason Segel) co-worker (guest star Amanda Peet) kissed him.
8 p.m., FOX
8 p.m., USATom Brokaw takes a roadtrip (well, sorta) along Highway 50 and investigates how people along the route are coping with economic, political, and cultural change.
Series premiere, 9 p.m., CWBritt Robertson) meets her birth parents (Shiri Appleby and Kristoffer Polaha) for the first time after being in foster care for her whole life.
10 p.m., ABCNathan Fillion) and Beckett's (Stana Katic) latest investigation leads them to clues about the unsolved murder of Beckett's mother.
Also on the airwaves...
The Bachelor, 8 p.m., ABC
One Tree Hill, 8 p.m., CW
Chuck, 8 p.m., NBC
The Secret Life of the American Teenager, 8 p.m., ABC Family
Accidentally on Purpose, 8:30 p.m., CBS
Two and a Half Men, 9 p.m., CBS
Heroes, 9 p.m., NBC
Intervention, 9 p.m., A&E;
Make It or Break It, 9 p.m., ABC Family
American Pickers, Series premiere, 9 p.m., HIST
Cake Boss, 9 p.m., TLC
The Big Bang Theory, 9:30 p.m., CBS
CSI: Miami, 10 p.m., ABC
Hoarders, 10 p.m., A&E;
NCAA Men's Basketball:Syracuse v. Notre Dame, Southern v. Mississippi Valley State
NCAA Women's Basketball:Connecticut v. Duke
NBA Basketball: Suns v. Grizzlies, Mavericks v. Cavaliers
NHL Hockey: Wild v. Stars
What are you watching tonight?
Follow TV.com writer Stefanie Lee on Twitter: @StefAtTVDotCom