With Leonard away, Sheldon and Penny spend quality time together sharing intimate secrets. Also, Wolowitz helps Raj get over his ex-girlfriend.
Jesse McCartney and his band are rehearsing in the hotel's basement, so London and Maddie disguise themselves as waitresses to meet them.
Zack and Cody can't find summer jobs, so they persuade Mr Moseby to let them open an underage, soft drinks club in the hotel. At first it's a flop, but then Zack takes over with ambitious plans.
Cody is practising for the spelling bee that's to be held in the hotel, while Zack's scrounging money to play in the arcade. Cody finds himself competing against someone who's lent Zack money.
Unbeknown to each other, the twins each invite a girl to their father's apartment while he is out. Esteban's family becomes very wealthy, so London teaches him how to be rich.
