8 p.m., NBCZachary Levi) and Sarah (Yvonne Strahovski) go up against an evil scientist (guest star Robert Englund), the real loyalties of Chuck’s mother (Linda Hamilton) are revealed, and (on a lighter note) the Buy More gang celebrates Halloween.
9 p.m., CBSCharlie Sheen) dates an “older” woman. What a horrific experience for him—this must be a Halloween episode, too!
9 p.m., FOXTricia Helfer guest-stars as a woman who hinders the Lightman Group’s investigation into a security leak at an art museum. How rude.
9 p.m., CWTaylor Momsen) returns to the Upper East Side when she gets the opportunity to meet Tim Gunn, who is guest-starring as himself. Meanwhile, Serena (Blake Lively) considers breaking up with Colin (Sam Page).
10 p.m., ABC
10 p.m., SHOMary-Louise Parker) reconnects with an old friend (guest star Richard Dreyfuss) while Silas (Hunter Parrish) and Shane (Alexander Gould) look into their mother’s mysterious past.
Also on the airwaves...
Dancing with the Stars, 8 p.m., ABC
How I Met Your Mother, 8 p.m., CBS
90210, 8 p.m., CW
Rules of Engagement, 8:30 p.m., CBS
The Event, 9 p.m., NBC
Top Gear, 9 p.m., BBC America
The Real Housewives of Atlanta, 9 p.m., BRAVO
Cake Boss, 9 & 9:30 p.m., TLC
Mike & Molly, 9:30 p.m., CBS
Hawaii Five-0, 10 p.m., CBS
Chase, 10 p.m., NBC
Hoarders, 10 p.m., A&E;
Thintervention with Jackie Warner, 10 p.m., BRAVO
The Big C, 10:30 p.m., SHO
NFL Football: Giants v. Cowboys
NHL Hockey: Kings v. Wild
What are you watching tonight?
Follow TV.com writer Stefanie Lee on Twitter: @StefAtTVDotCom