After discovering that he is adopted, David begins to contemplate the possibility that he may be Jewish; Eva's sister turns out to be an idiot savant; and Club Biscuit holds its first pub quiz.
Gail Porter refuses to stay over with Ethan because he doesn't have an en-suite bathroom; Eva decides to testify against her former lover, now on trial for mass murder; and rumours about Peter abound, following his misguided decision to grow a moustache.
Peter falls for a lifestyle journalist who writes about his shortcomings every week in her column. Meanwhile, Eva, desperate for a residency permit, offers Ethan 2,000 pounds to marry her.
David is terrorised in the gym steam room by an obese man who stands too near while huffing and slapping himself; Peter is annoyed that the Club Biscuit kitchen staff won't serve him a rare burger.
David, Ethan, and Peter attempt to dump some rubbish in an uptight neighbour's skip, while Eva puts the immigration inspectors off the scent by posing as a conceptual artist.
David attempts to hypnotise himself into tolerating his new girlfriend's irritating mannerisms; meanwhile, next door, Peter infuriates everyone by taking up pipe smoking.