It's Always Sunny in Philadelphia (2005)

S15E4 The Gang Replaces Dee with a Monkey

Title: The Gang Gets a New Employee Plot: After noticing changes in Dee's behavior that lead them to believe she might be going through menopause, the Gang rushes to find a replacement for her at Paddy's Pub. Meanwhile, Dee chooses to step back from her acting ambitions to focus on mentoring aspiring performers.