The Big Bang Theory

Penny worries that she's screwed things up permanently with her friends after her night with Raj, while Sheldon takes command of the paintball team. S5, Ep1

Leonard and Amy get to know each other better at a co-worker's wedding. Howard and Bernadette spend the weekend with Mrs. Wolowitz! S5, Ep3

Raj is upset he's the only one of the four guys who's not in a relationship, so Penny sets out to find the perfect date. S5, Ep4

Russian Rocket Reaction, The. Sheldon and Leonard get invited to a housewarming party at Wil Wheaton's house. Howard gets an out-of-this-world opportunity! S5, Ep5

Craving a little motherly love, Sheldon competes with the gang for his mother's attention when she comes to visit. S5, Ep6

A cute comic book artist tests Leonard's relationship with Priya, while Sheldon, getting into the Halloween spirit, tries to scare the guys. S5, Ep7

Amy is heartbroken when Bernadette and Penny go shopping for wedding dresses without her. S5, Ep8

Can friends with benefits still be friends without? Leonard and Penny try hanging out alone, while Sheldon must overcome his fear of birds. S5, Ep9

Flaming Spittoon Acquisition. Sheldon becomes jealous and considers taking his relationship with Amy to the next level when Stuart from the comic book store asks her out on a date. S5, Ep10

Leonard must face his fears after being contacted by his high school tormentor, while Penny realises that she might have been a bully herself. S5, Ep11

Sheldon gets in trouble with Amy, and it's up to Penny to teach him how to be a better boyfriend. Howard deals with Bernadette's dislike of children. S5, Ep12

Everything might change when Leonard offers Penny a spur of the moment invitation to a romantic dinner for two on the 100th episode of the series. S5, Ep13

Leonard and Penny experiment with dating again by 'beta testing' their relationship. Raj develops a weird bond with his phone's virtual assistant. S5, Ep14

Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Howard tries to pick his astronaut nickname. S5, Ep15

When Sheldon is forced to take a vacation by the university, he goes to work with Amy in her neurobiology lab. S5, Ep16

When a corner office at the university opens, Sheldon must compete for it with his office nemesis, Barry Kripke. Penny gets an unusual gift from Amy. S5, Ep17

A change in Sheldon's routine forces him to re-evaluate his entire life, when his barber is sick. Howard rethinks his decision to go into space. S5, Ep18