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The Big Bang Theory S9E23 poster

Watch The Big Bang Theory – Season 9 Episode 23: The Line Substitution Solution

The Big Bang Theory • Season 9, Episode 23 • 18 min • 2007 • ⭐ 7.9/10 • Comedy

Cast: Jim Parsons , Kaley Cuoco , Johnny Galecki , Simon Helberg , Kunal Nayyar , Melissa Rauch , Mayim Bialik

Directors: Chuck Lorre , Bill Prady

Watch The Big Bang Theory – S9E23

Episode Overview

Sheldon hires Stuart to spend the day with Amy when he’d rather go to a movie screening. Also, Leonard’s mother, Beverly, comes to town and Penny struggles to make a connection with her.

Episode Navigation

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