Alex Ball

Sheldon and Penny bond in Leonard's absence. Koothrapoli finds someone to share his heartache with. Elsewhere, while away at an out-of-town conference, Bernadette and Amy are hit on at the hotel bar.

Love is in the air when Amy convinces Sheldon to join her, as well as Howard and Bernadette, for a romantic train trip to Napa Valley to celebrate Valentine's Day.

Rachel makes the mistake of going for a job interview at a restaurant where her current boss is also dining. Phoebe discovers she can change her name to whatever she likes - Princess Consuela Bananahammock seems the logical choice, until Mike proves that two can play her game - and Joey, upset that Chandler and Monica are moving, is comforted by an eight-year-old.

Katie must overcome her fear of wearing a bathing suit in public to help Anna-Kat get over her own fear of water. Oliver gives Greg a makeover.

Travis' first big breakup forces Jules to come to a realization about herself.

McGee and Bishop travel to Afghanistan after a murder case in the states is linked to a string of soldiers killed by friendly fire overseas. Kasie leaves the lab and accompanies Torres into the field to process additional forensic evidence.