Living out of a hotel, Larry and Cheryl make a successful bid on a seaside chateau owned by Jason Alexander's new agent, Jay Schneider. Moving in, however, they learn their new dream home has a disturbing sound of unknown origin.
Penny’s old boyfriend, Zack (recurring guest star BRIAN THOMAS SMITH), and his wife want a baby, but when Zack is infertile, they ask Leonard to help. Meanwhile, Raj attempts to mend things with his ex-fiancée Anu.
Bonnie drives everyone crazy after her break-up with Adam, prompting Christy to try to get the couple back together again.
Phoebe's half-brother makes an astounding announcement and a thought-provoking request, while Joey finds himself in a class struggle.
Zack and Cody take aptitude tests. Zack is told he'd make a good CEO, while Cody's best qualified to be a garbage collector! Meanwhile, Maddy saves a VIP's life.