Watch The Official Big Bang Theory Podcast

Kunal Nayyar, beloved by fans as Raj Koothrappali, joins host Jessica Radloff to revisit his all-time favorite episode of "The Big Bang Theory": "The Adhesive Duck Deficiency." Kunal shares behind-the-scenes stories and hidden Easter eggs from the fan-favorite episode, including why co-creator Chuck Lorre told him and co-star Johnny Galecki to put their shirts back on during one memorable scene. He also reflects on the extraordinary success of the series, why "The Big Bang Theory" was always bigger than any one cast member, and the personal sacrifices the cast made to ensure they never missed a taping.

The hilarious Melissa Rauch joins host Jessica Radloff to discuss how she landed the role of Dr. Bernadette Rostenkowski-Wolowitz on "The Big Bang Theory." Melissa shares her journey from the unemployment office to one of television's most beloved sitcoms and reveals how she developed Bernadette's iconic voice (spoiler alert: it's not her real voice!). She also reflects on the "Big Bang" audience, which she describes as "electric" and unlike anything she had ever experienced. Plus, she explains why she considers co-star Simon Helberg to be "mind-blowingly talented."

Sheldon Cooper's ultimate nemesis, Wil Wheaton, joins host Jessica Radloff to look back on his unforgettable run on "The Big Bang Theory" — including why he calls his time on set "the best days of my life." Wil shares why he almost passed on the role that would make him a fan-favorite villain, how growing up a self-proclaimed nerd made him the perfect fit for the show, and the real-life connection he felt with Sheldon and the gang. Plus, he reveals hidden Easter eggs and behind-the-scenes details from his iconic Season 3 episodes that even longtime fans might have missed.

The one and only Simon Helberg joins host Jessica Radloff for a nostalgic look back at his 12 seasons as fan favorite Howard Wolowitz. Simon reflects on his unforgettable on-screen — and real-life — bromance with Kunal Nayyar and shares how Howard began to evolve once his relationship with Bernadette took center stage in Season 3. Plus, he reveals his first impressions of Melissa Rauch and opens up about what it's like watching his old "Big Bang" episodes now through the eyes of his own children.

"The Official Big Bang Theory Podcast" is back! To kick off the new season, host Jessica Radloff sits down with executive producer and showrunner Steve Molaro for a behind-the-scenes deep dive into the Penny and Leonard romance that launched Season 3.