Penny and Leonard go bowling and Leoanrd sure does seem to be celebrating something.
Rating: 5.0 / 5.0
Might Raj be getting over his fear of women as he sits closely with the beautiful Abby (Danica McKellar) he met at a mixer.
Rating: 5.0 / 5.0
Penny and Leonard's mom, Beverly (Christine Baranski) go for some shots of tequila at the Cheesecake Factory.
Rating: 5.0 / 5.0
You gotta love this guest-starring appearance on The Big Bang Theory: that's former sitcom star Mayim Bialik!
Rating: 5.0 / 5.0
In nine seasons of The Big Bang Theory, we've never met Leonard's father. Until now! Chaos ensues when he shows up, along with both Leonard's other and Sheldon's.
Rating: 5.0 / 5.0
After having an emotional dream, Sheldon hugs Leonard to show he cares.
Rating: 5.0 / 5.0
Sheldon tries to attack Leonard with his mind when he goes to give a presentation that Sheldon does not approve of.
Rating: 5.0 / 5.0
Sorry, it's not the best picture, but here's a photo of Bernadette from The Big Bang Theory.
Rating: 5.0 / 5.0
That's Katee Sackhoff and that's George Takei. Both guest star as themselves on the episode "The Hot Troll Deviation."
Rating: 5.0 / 5.0
Judy Greer guest starred on The Big Bang Theory as Dr. Plimpton, a famous physicist that Sheldon invites to spend the weekend at the place.
Rating: 5.0 / 5.0
We all know what happened between Penny and Raj on the season four finale. Here they are on the ssason five premiere.
Rating: 5.0 / 5.0
On Valentine's Day, Sheldon kisses Amy on a vintage train ride after a disastrous dinner.
Rating: 5.0 / 5.0

TBBT Quotes

Penny, there's only one cookie with something in the middle that solves life's problems, and that's an Oreo. Or a Nutter Butter, if you're in a pinch.

Sheldon

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.