On TV Tonight, Monday 3/23: CHUCK, MEDIUM, and more…

CHUCK “Chuck Versus the Predator” – 8pm NBC

GOSSIP GIRL “The Grandfather” – 8pm The CW

HOW I MET YOUR MOTHER “Old King Clancy” – 8:30pm CBS

24 “Day 7: 10:00PM-11:00PM” – 9pm Fox

Roommates “The Roommate” – 9pm ABC Family

CASTLE “Hedge Fund Homeboys” – 10pm ABC

MEDIUM “A Necessary Evil” – 10pm NBC