In episode 4, 'Love,' the French love affair involving Joe and Kati takes a significant turn. Joe, an American living in France, is involved with Kati, who calls him 'Juju.' The episode continues from the previous one where Kati suggests Joe can sleep with her if he first sleeps with her twin sister, Brigitte. This storyline explores the complications and developments in their romantic entanglement in France.

In episode 4, a subplot involves a woman whose last wish shocks her husband. The details of this last wish are a key plot element that blindsides the husband, creating dramatic tension in the episode. However, the exact nature of the wish is not explicitly detailed in the available summaries.

A routine flight featured in episode 4 turns frightening after the plane hits rough air. This event adds suspense and tension to the episode, contrasting with the other storylines involving love and personal relationships.

Joe's interaction with Kati and her twin sister Brigitte is central to the episode. Kati initially tries to get Joe to sleep with Brigitte before he can be with her. This unusual arrangement and Joe's navigation of it form a significant part of the episode's plot, continuing from the previous episode and deepening the character dynamics.

Episode 4 features several key characters including Joe, played by Tom Segura, and Kati, played by Malin Barr. Other notable cast members include Sarah Burns, Bobby Lee, Rachel Bloom, and Lyric Lewis. These characters drive the episode's intertwined storylines involving love, last wishes, and a tense flight.