Jenna prepares for her first Valentine's Day with a boyfriend; Jenna and Tamara are jealous that Matty and Ricky seem to be moving on.

Dave welcomes actor Joel McHale, comedian Andrew Norelli, and musical guest Will.I.Am. Top Ten Nations Competing in the Olympics or Bones in the Human Body. Biff Henderson hangs out with some of the United States' top athletes. Are Joel McHale and Chevy Chase fighting behind the scenes at "Community"?

Louie goes on a date.

When a pattern emerges among several cases of missing women, Gail goes under cover to investigate; Dov and Chris discover a body, leading them to believe Gail is in danger.

With Charlie's life hanging in the balance, Alex and Dawn go head-to-head over who gets to be his legal decision maker – but are forced to put personal matters aside when they scrub into a heart transplant surgery together. Charlie, meanwhile, is in no mood to talk to the heart donor – a deceased prisoner.

Harvey's personal history with a client forces he and Mike to take on an unorthodox case from which they'd normally walk away. Also, Louis and Rachel team up to save a mutually beloved institution from ruin.

Engineers enhance Olympic sounds, Mitt Romney offends England, Chick-Fil-A opposes gay marriage, and Peter Westmacott discusses the summer Olympic games.

Actor Vince Vaughn pops in during the cold open to promote his movie; actor Emile Hirsch; TV host Ariel Tweto.