HAPPY ENDINGS - "The Quicksand Girlfriend" - Dave's one-night-stand with Andrea (Courtney Henggeler) lands him in "chicksand" as the hookup evolves into a relationship he's just not ready for yet. Jane, who thinks Alex is a terrible judge of people, can't keep herself from getting involved when her sister looks for a roommate now that Dave's moved out, on "Happy Endings," WEDNESDAY, APRIL 13 (10:00-10:30 p.m., ET) on the ABC Television Network. (ABC/JORDIN ALTHAUS) DAMON WAYANS JR., ADAM PALLY, COURTNEY HENGGELER, ZACHARY KNIGHTON