Raj & Howard: Can the Bromance Survive?

Kunal Nayyar breaks down Raj's Season 4 journey, from his bromance with Howard to Raj's unrequited feelings for Bernadette.

How Mayam Bialik Became Amy Farrah Fowler

Mayim Bialik joins Jessica Radloff to look back on her first season as Amy Farrah Fowler on "The Big Bang Theory."

Zack, the Justice League, and the Lost Episode

Brian Thomas Smith joins Jessica Radloff to revisit his nine-season run as Zack Johnson, Penny's lovable but hilariously clueless boyfriend.

The Evolution of Dr. Bernadette Rostenkowski

Melissa Rauch looks back on the season that changed everything as Bernadette became a series regular on "The Big Bang Theory."

Simon Helberg on 'The Big Bang Theory' Magic

Simon Helberg reflects on the magic of "The Big Bang Theory" and the incredible way the show connected people around the world.

Building the 'Big Bang' Ensemble

E/P and showrunner Steve Holland joins Jessica Radloff to look back at how "The Big Bang Theory" evolved into one of TV's most memorable ensembles.

Josh Malina and the 'Big Bang' Guest Stars

Josh Malina joins Jessica Radloff to look back at his recurring role as President Siebert and reveals he originally auditioned to play Lenoard!

The Controversial Season 4 Finale

Season four ended with Penny and Raj waking up in bed together. Steve Molaro reveals why he spent the hiatus trying to figure out a way to undo it.

Raegan Revord and the 'Young Sheldon' Easter Eggs Hidden in 'The Big Bang Theory'

"Young Sheldon" star Raegan Revord, aka Missy Cooper, takes a deep dive into the "Young Sheldon" Easter eggs hidden throughout "The Big Bang Theory."

Bonus Episode: Meet Captain Sweatpants

Captain Sweatpants, one of "Big Bang's" most recognizable recurring characters, opens up about how a background role turned him into a fan favorite.