"The Countdown Reflection"

The gang must hurry to plan a wedding when Howard and Bernadette decide to have the event before the NASA launch on the season finale of The Big Bang Theory.

"The Stag Convergence"

Will Wheaton plays a party guest while Bernadette rethinks getting married on The Big Bang Theory.

"The Transporter Malfunction"

Sheldon is haunted by Mr. Spock on this episode of The Big Bang Theory, as Leonard Nimoy guest voices.

"The Werewolf Transformation"

Sheldon's barber gets sick this week, while astronaut training causes Wolowitz to rethink his decision to head into space.

"The Vacation Solution"

Sheldon tries to take a vacation this week, by working with Amy at her neurobiology lab. Howard, meanwhile, gets all worked up.

"The Beta Test Initiation"

Leonard and Penny experiment with dating again this week, while Raj develops an odd connection with his phone's virtual assistant.

"The Shiny Trinket Maneuver"

Sheldon isn't sufficiently impressed by Amy's accomplishment on The Big Bang Theory this week, while Howard must be okay with Bernadette disliking kids.

"The Flaming Spittoon Acquisition"

Sheldon grows jealous of Amy dating someone else this week. That other man is Stuart from the comic book store.

"The Isolation Permutation"

Bernadette and Penny go shopping for a wedding dress on The Big Bang Theory this week. Without Amy!

"The Rhinitis Revelation"

Laurie Metcalf comes on board this episode of The Big Bang Theory. She plays Sheldon's mother.

"The Wiggly Finger Catalyst"

Raj meets a girl this week! One with whom he actually communicate!

"The Infestation Hypothesis"

Amy is caught in the middle this week, as Sheldon and Penny fight. Leonard, meanwhile, tries to spice things up with Priya.