In the Smoke (S05E07)

While on holiday in London, the Crabbes stay at a flat owned by former police officer Nick Spencer, who is away in America for work. Margaret stumbles upon his suitcase tucked away under the bed and hears a voicemail from his daughter, warning that her dangerous ex-boyfriend Danny is en route to confront him. Meanwhile, Henry uncovers Nick hiding out, while Margaret unexpectedly finds Danny's lifeless body in the trash, a victim of Nick's self-defense. As tensions rise, Henry faces a dilemma of loyalty, testing the patience of Sally and Gary when the agency staff reveal themselves to be a feuding couple.