Gym (S04E03)

To escape Sophie’s company, Mark signs up for a gym membership. While exercising, he unexpectedly encounters Nancy, Jeremy's former wife, who works there. Mark informs Jeremy, igniting a strong desire in him to rekindle their romance. In an effort to win her back, Jeremy takes a job as a janitor at the gym and hatches a plan to disrupt her budding relationship with Mark's trainer, Matt.