Should She Stay or Should She Go is the 10th episode of the third season and the thirty-fifth episode overall of The Odd Couple which was aired on January 9, 2017.
Felix takes the first step in moving on from Emily by picking up a bartender named Natasha and bringing her home for the night. It later backfires when Felix doesn't know how to have a one-night stand; Natasha starts to get attached and won't leave. Meanwhile, Oscar takes his relationship with Charlotte to the next level by asking her to leave her toothbrush at his apartment, after which they get into a conversation about their relationship and say "I love you" to each other.