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The Official Big Bang Theory Podcast

Season 2 · Episode 4

Zack, the Justice League, and the Lost Episode

0.034mAugust 17, 2026

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

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Episode 1The Birth of the 'Big Bang' Seven⁩
Episode 2Raj & Howard: Can the Bromance Survive?
Episode 3How Mayam Bialik Became Amy Farrah Fowler
Episode 4Zack, the Justice League, and the Lost Episode
Episode 5The Evolution of Dr. Bernadette Rostenkowski
Episode 6Simon Helberg on 'The Big Bang Theory' Magic
Episode 7Building the 'Big Bang' Ensemble
Episode 8Josh Malina and the 'Big Bang' Guest Stars

Episode 9The Controversial Season 4 Finale

Episode 10Raegan Revord and the 'Young Sheldon' Easter Eggs Hidden in 'The Big Bang Theory'

Episode 11Bonus Episode: Meet Captain Sweatpants