On TV Tonight, Monday 3/16: KYLE XY, GOSSIP GIRL, and more…

GOSSIP GIRL “The Age of Dissonance” – 8pm The CW

HOUSE “Here Kitty” – 8pm Fox

HOW I MET YOUR MOTHER “The Front Porch” – 8:30pm CBS

24 “Day 7: 9:00PM-10:00PM” – 9pm Fox

KYLE XY “Bringing Down the House” – 9pm ABC Family

CASTLE “Nanny McDead” – 10pm ABC