Senor Chang threatens to fail the whole class unless a cheater owns up; Jeff defends the one who comes forward. Annie and Pierce team up to compose a new school song.

The Fringe team travels cross-country to Seattle after learning of a mysterious incident involving a man who attacked his boss because he believed he was an evil ram-horned creature. As these puzzling occurrences continue, the team tirelessly explores strange and creepy links to dreams. In pursuit of additional information, Agent Broyles has a disconcerting meeting with enigmatic Massive Dynamic executive Nina Sharp that leads the investigation in an unthinkable direction.

Claire and Mitchell’s mother makes a surprise visit to make amends for what has been termed « the incident » at Jay and Gloria’s wedding. Everything comes to a head when the whole family shows up to dinner at Claire’s house.

Frankie and Mike’s romantic anniversary get-away is ruined by various family matters, including Brick being sick, Sue being lovesick, Axl just getting his learner’s permit, and two psychotic aunts and their dog.

Alicia stumbles onto something that indicates possible jury tampering on her firm’s class action law suit against a pharmaceutical company. Peter’s legal team continues their work for his upcoming appeal, and Alicia keeps butting heads with Peter’s attorney.

When an Arctic explorer is killed during a polar expedition, the mysterious circumstances of his death take Castle and Beckett from the penthouses of Park Avenue to the halls of the CIA. But Castle’s delight at the case’s many twists and turns soon turns to frustration as he realizes that their elusive killer might just be fooling them all.

Samuel prepares for new additions to his family, while Lydia warns him of the consequences. Claire discovers that her roommate Gretchen may have a hidden agenda. Meanwhile, Peter finds an unexpected way to connect with Emma, who would prefer to stay distant. Elsewhere, a different side of Sylar emerges as he desperately tries to remember the person he used to be.

Marshall and Lily want to hook up with Barney and Robin for double-dating and fun, but their desperate eagerness to please is a huge turn-off. Meanwhile, when a succession of girls come to his apartment and immediately fall asleep, Ted is bummed to learn he is a « Sexless Innkeeper » whose « dates » are only interested in a comfy place to crash

A man from the American Embassy in Mexico asks Cal to « unofficially » investigate the disappearance of an American woman after local police refuse to look into it. Meanwhile, Cal’s rival, Jack Rader, works with Gillian to identify the person responsible for tainting the blood bank supply when several patients become seriously ill, and one dies.

Echo and Victor’s imprints collide when Echo is sent on an assignment as a fun-loving, seductive college student and Victor is imprinted as the psychotic nephew of a Dollhouse shareholder.