Ep 23. The Change Constant

The Big Bang Theory season 12 episode 23, titled "The Change Constant," centers on the impending move of Sheldon and Amy to Princeton. The couple are excited about the opportunity for Amy's career, but their friends are struggling with the knowledge that things will never be the same between the group, and they won't see Sheldon and Amy as much as they used to.

As the gang gathers to celebrate Sheldon and Amy's last night in the apartment, emotions are high as they contemplate the changes that are coming. Howard and Bernadette struggle to say goodbye to their best friends, Raj is left wondering how he will cope without Sheldon's friendship, and Leonard feels particularly affected by the changes, as he is both worried about the future of his own relationship with Penny and, being Sheldon's best friend, he has to say goodbye to his closest companion.

Despite the bittersweet nature of their last night in the apartment, Sheldon has one last request; he wants to take one final ride on the elevator. Fans of the show will be thrilled to see the resolution to this long-standing joke.

"The Change Constant" is a touching and emotional episode that sees the characters coping with the inevitable changes that are coming in their lives. As always, the writing is hilarious and the performances are fantastic, delivering laughs and heartfelt moments in equal measure. Fans of the show are sure to be left feeling satisfied with the conclusion of this beloved series.