First Look: Change Isn't Always Easy On The Big Bang Theory

Sheldon speaks with Penny and Leonard about their current living situation

Sheldon speaks with Penny and Leonard about their current living situation

When Sheldon learns of an impending change in his living arrangements, he decides to revert back to 2003, which was a much simpler time. Why? Because it was before he met Leonard.

Check out more first-look photos from Ep. 4 ("The 2003 Approximation") of The Big Bang Theory.
Sheldon talks over his roommate problems with Bernadette

Sheldon talks over his roommate problems with Bernadette

"The 2003 Approximation" (Season 9, Episode 4)
Howard and Raj discuss a new venture together

Howard and Raj discuss a new venture together

"The 2003 Approximation" (Season 9, Episode 4)
Stuart seeks help from Howard and Raj

Stuart seeks help from Howard and Raj

"The 2003 Approximation" (Season 9, Episode 4)
Sheldon, Penny, and Howard discuss their living arrangements

Sheldon, Penny, and Howard discuss their living arrangements

"The 2003 Approximation" (Season 9, Episode 4)
Howard and Raj make beautiful music together

Howard and Raj make beautiful music together

"The 2003 Approximation" (Season 9, Episode 4)
Sheldon reveals his solution to Leonard moving out of their apartment

Sheldon reveals his solution to Leonard moving out of their apartment

"The 2003 Approximation" (Season 9, Episode 4)
Raj serenades his girlfriend, Emily

Raj serenades his girlfriend, Emily

"The 2003 Approximation" (Season 9, Episode 4)
Raj and Howard show songwriting can be hard

Raj and Howard show songwriting can be hard

"The 2003 Approximation" (Season 9, Episode 4)
Penny and Leonard discuss Sheldon's roommate problem

Penny and Leonard discuss Sheldon's roommate problem

"The 2003 Approximation" (Season 9, Episode 4)

Watch all-new episodes of The Big Bang Theory on Monday at 8/7c.