Ep 3. Gym

Mark and Jez decide to join a gym in an attempt to get in shape and improve their lives. However, they quickly realize that they are not cut out for the gym lifestyle. Mark becomes obsessed with tracking his progress and following a strict exercise regimen, while Jez becomes more interested in impressing a female personal trainer than actually working out.

As they struggle to keep up with the intense workouts and demanding schedule, Mark and Jez begin to question the true value of physical fitness and whether it is worth all the effort. They also come to realize that the gym is not the magical solution to all their problems that they had hoped it would be.

Meanwhile, Sophie is dealing with her own gym-related issues as she tries to get back in shape after having a baby. Her struggles with body image and self-confidence are exacerbated by a rude and judgmental gym employee who refuses to let her use certain machines. Eventually, Sophie decides to take matters into her own hands and stand up for herself, inspiring both Mark and Jez to do the same in their own lives.

Overall, "Gym" is a hilarious and insightful episode of Peep Show that pokes fun at our culture's obsession with physical fitness and the notion that going to the gym is the key to happiness and success. Through the struggles of its main characters, the episode ultimately highlights the importance of self-acceptance and finding joy in the things that make us unique, rather than trying to fit into society's narrow definition of what it means to be "healthy" or "attractive."