1. The Skank Reflex Analysis On the fifth season premiere, 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.
2. The Infestation Hypothesis A battle of wills between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya (AARTI MANN).
3. The Pulled Groin Extrapolation Attending a co-worker's wedding, Leonard and Amy (MAYIM BIALIK) get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz!
4. The Wiggly Finger Catalyst When Raj is upset he's the only one of the four guys who is not in a relationship, Penny sets out to find the perfect date, introducing him to Emily (guest star KATIE LeCLERC - Switched at Birth) a girl he can actually talk to!
5. The Russian Rocket Reaction Sheldon and Leonard get invited to a housewarming party at WIL WHEATON's house; while Howard gets an out-of-this-world opportunity!
6. The Rhinitis Revelation Craving a little motherly love, Sheldon competes with the gang for his mother's attention when she comes to visit. LAURIE METCALF reprises her role as Sheldon's mother, Mary.
7. The Good Guy Fluctuation A cute comic book artist (guest star COURTNEY FORD) puts Leonard's relationship with Priya to the test; while Sheldon, getting into the spirit of Halloween, tries to scare the guys.
8. The Isolation Permutation Amy is heartbroken when Bernadette and Penny go shopping for wedding dresses without her.
9. The Ornithophobia Diffusion Can friends with benefits still be friends without? Leonard and Penny try hanging out alone, while Sheldon must overcome his fear of birds.
10. The Flaming Spittoon Acquisitoin Sheldon becomes jealous and considers taking his relationship with Amy to the next level when Stuart (guest star KEVIN SUSSMAN) from the comic book store asks her out on a date.
11. The Speckerman Recurrence Leonard must face his fears after being contacted by his high school tormentor (guest star LANCE BARBER), while Penny realizes that she might have been a bully herself.
12. The Shiny Trinket Maneuver Sheldon gets in trouble with Amy, and it's up to Penny to teach him how to be a better boyfriend. Howard, meanwhile, must come to grips with Bernadette's dislike of children.
13. The Recombination Hypothesis 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.
14. The Beta Test Initiation Leonard and Penny experiment with dating again by "beta testing" their relationship, while Raj develops a peculiar relationship with his phone's virtual assistant.
15. The Friendship Contraction Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Howard tries to pick his astronaut nickname. NASA astronaut MIKE MASSIMINO guest stars.
16. The Vacation Solution When Sheldon is forced to take a vacation by the university, he goes to work with Amy in her neurobiology lab. Meanwhile, Bernadette wants Howard to sign a pre-nuptial agreement.
17. The Rothman Disintegration When a corner office at the University opens up, Sheldon must compete for it with his office nemesis, Barry Kripke. Meanwhile, a personal gift from Amy makes Penny uncomfortable.
18. The Werewolf Transformation A change in Sheldon's routine forces him to re-evaluate his entire life, when his barber is sick. Meanwhile, Howard rethinks his decision to go into space after astronaut training.
19. The Weekend Vortex It's on...like Alderaan, when the guys plan a weekend Star Wars gaming marathon! But when Sheldon chooses the guys-only weekend over a weekend with Amy to visit her aunt, he is destined to feel the force!
20. The Transporter Malfunction It's a dream come true for Sheldon when he has a close encounter with his hero, Mr. Spock - legendary sci-fi icon LEONARD NIMOY.
21. The Hawking Excitation When Wolowitz gets tow work with world-renowned scientist STEPHEN HAWKING (guest starring as Himself), Sheldon is willing to do anything to meet his hero.
22. The Stag Convergence Howard's wedding plans are in jeopardy after the guys (and Wil Wheaton) throw him a bachelor party. After details of his sexual history are leaked online, Bernadette reconsiders marrying Howard.
23. The Launch Acceleration When NASA reschedules Howard's mission and puts his wedding plans in jeopardy, he's forced to face his fears and Bernadette's dad (guest star CASEY SANDER).
24. The Countdown Reflection When Howard and Bernadette decide they want to be married before his NASA space launch, the gang rushes to put on a wedding, on the fifth season finale.
|Starring||Johnny Galecki, Jim Parsons|
|Supporting actors||Kaley Cuoco, Simon Helberg, Kunal Nayyar, Mayim Bialik, Melissa Rauch, Casey Sander, Karl T. Wright, Robert Clotworthy|
|Executive Producer||Jessica Ambrosetti|
|Purchase rights||Stream instantly and download to 2 locations Details|
|Format||Amazon Instant Video (streaming online video and digital download)|