S05E18 The Werewolf Transformation

Sheldon wreaks havoc when he tries to get a haircut from his regular barber, who is ill. Howard runs into a few problems with astronaut training.

S05E17 The Rothman Disintegration

Sheldon battles Barry Kripke for a coveted office at the university. Penny receives a very unusual gift from Amy.

S05E16 The Vacation Solution

When the university forces Sheldon to use vacation days, he decides to hang out in Amy's lab. Bernadette wants Howard to sign a prenuptial agreement.

S05E15 The Friendship Contraction

Leonard signs out of his roommate agreement, reducing himself and Sheldon to mere acquaintances, while Howard tries to think of a cool astronaut nickname for himself.

S05E14 The Beta Test Initiation

Leonard and Penny develop a system to insure their dates go smoothly. Raj finally finds a woman he can talk to - the virtual assistant on his mobile phone.

S05E13 The Recombination Hypothesis

Leonard and Penny contemplate reviving their romantic relationship. Sheldon's attempt to order Star Trek memorabilia doesn't go as planned.

S05E12 The Shiny Trinket Maneuver

Penny must help Sheldon work on his relationship with Amy when he trivializes one of her accomplishments. Bernadette's dislike of children bothers Howard.

S05E11 The Speckerman Recurrence

Leonard must confront the man who bullied him in high school, while Penny realizes she did her fair share of tormenting in the past.

S05E10 The Flaming Spittoon Acquisition

When Stuart from the comic book store asks Amy on a date, Sheldon considers having a more serious relationship with her. Meanwhile, the guys become obsessed with a new card game involving Wild West heroes and witches.

S05E09 The Ornithophobia Diffusion

Sheldon must overcome his fear of birds while Leonard and Penny attempt to hang out together strictly as friends.

S05E08 The Isolation Permutation

Amy is hurt when Bernadette and Penny goes bridesmaid dress shopping without her, so she turns to a reluctant Sheldon for comfort.

S05E07 The Good Guy Fluctuation

Sheldon tries to get into the spirit of Halloween by trying to scare the guys after they prank him. A comic book artist is interested in Leonard.

S05E06 The Rhinitis Revelation

Sheldon is upset when his mom comes to visit but refuses to cook for him and attend physics lectures.

S05E05 The Russian Rocket Reaction

Sheldon takes offense when Leonard wants to attend a party with Star Trek's Wil Wheaton and Brent Spiner, and Bernadette tries to block Howard's opportunity to go into outer space.