NBC, the WB
Why is familial dysfunction a staple of Christmas programming? Because everyone can relate. Our personal favorites were Jack Donaghy turning the perfect Lemon family dysfunctional ("30 Rock") and Aaron Echolls getting stabbed in front of his wife and hundreds of guests ("Veronica Mars") by a catering waitress he slept with. Merry Christmas! Call 911!
Other offenders: "Beverly Hills, 90210," "Everybody Loves Raymond," "Gossip Girl," "Roseanne"