Big Bang Theory recap: Season 11, Episode 11

Howard and Raj remain in a fight. Sheldon prepares for Amy's birthday.

Big Bang Theory recap: Season 11, Episode 21

The Big Bang Theory Season-11-Premiere Recap

The Big Bang Theory' Season 11 Episode 18 Recap: Penny Envisions a New Career

The Speckerman Recurrence, The Big Bang Theory Wiki

The Big Bang Theory: Top Moments from The Confidence Erosion (Season 11 Episode 10)

Big Bang Theory recap: Season 11, Episode 15

The Big Bang Theory Recap Season 11 Episode 20

Big Bang Theory recap: Season 11, Episode 17

Big Bang Theory Christmas special recap

The Big Bang Theory Season 11 Episode 1 Review: The Proposal Proposal

The Big Bang Theory Recap Season 11 Episode 4: Parental Woes

Big Bang Theory' Season 11, Episode 14 recap: guest stars shake up Raj's world

The Opening Night Excitation, The Big Bang Theory Wiki