Knock-knock-knock. “Penny?” Knock-knock-knock. “Penny?” Knock-knock-knock. “Penny?”
The Big Bang Theory forever embedded that sound in its viewers’ brains over the course of its 12 seasons, as Sheldon (Jim Parsons) deployed his signature way of knocking countless times. Though the hit sitcom has now concluded, fans will have the opportunity to revisit their favorite moments and episodes to their hearts’ content with the new complete series box set, available Tuesday, Nov. 12 on DVD and Blu-ray. (Not to mention when the series arrives on HBO Max next year.) In the meantime, EW has an exclusive clip from the set’s new bonus features: a journey through the series via Sheldon’s knock.
The clip features many of the running gag’s most memorable variants: Sheldon’s rapid-fire knocking while dressed as the Flash, speaking with the aid of a computer voice program, and calls for not just Penny (Kaley Cuoco) but LeVar Burton, Wil Wheaton, and “all my friends.”
Check out the exclusive clip above.
- The Big Bang Theory stars look back on 12 seasons of the hit sitcom
- You can sit in Sheldon Cooper’s spot now on the Warner Bros. Studio Tour
- The Big Bang Theory showrunner Steve Holland answers burning questions about the series finale
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