Joey's new girlfriend wants to go to bed with him, but Joey's participation in a fertility study is preventing this. During Rachel's birthday party, Chandler accidentally lets it slip that Ross is in love with her.

Homer and Marge enjoy a night out on the town. Meanwhile, at home, the kids deal with a diabolical babysitter.

First aired: 5/19/2008 Production Code: 3T6616 Penny's break-up spurs Leonard to summon the courage to ask her out, and each goes to Sheldon for advice on their upcoming date.

Can Sylar be stopped? Will Linderman's vision live on with Nathan? What will it take for Peter to save the world? What sacrifices will be made? With all the horrible predictions unfolding before them, the heroes face moments of pain and peril in Kirby Plaza.