The Guys Have A Crisis Of Science On The Big Bang Theory

A mortifying radio interview leaves Leonard and his buds questioning physics itself in the new episode "The Retraction Reaction."

When it comes to the guys' perception of reality, Sheldon ( Jim Parsons), Leonard ( Johnny Galecki), Howard ( Simon Helberg), and Raj ( Kunal Nayyar) have a pretty good handle on things—not least of all because they're literally experts on that sort of thing.

WATCH: Preview Of Episode 2, Season 11 Of The The Big Bang Theory

But after Leonard gives a downbeat interview on the radio in the latest installment of The Big Bang Theory (with special guest and NPR Host Ira Flatow returning), he and his cohorts begin to second guess their very careers as scientists!

Meanwhile, Amy ( Mayim Bialik) and Bernadette ( Melissa Rauch) bond over hiding their career success from their respective (and occasionally insecure) paramours in an all-new episode of The Big Bang Theory entitled "The Retraction Reaction."

Will the guys come to grips with this new existential crisis?

Watch all-new episodes of The Big Bang Theory on Mondays at 8/7c on CBS and CBS All Access.