Trivia: When Alex goes into the Blitz Club, she hands her coat to the cloakroom attendant, saying, "Thank you, George". This is a sly reference to the singer Boy George, who, before becoming famous just one year later, really was the cloakroom attendant at the Blitz Club.
Trivia: In Episode 1 Series 1, in the opening scenes, Alex drives past a building where we see a man apparently ready to jump off the roof [probably intended as a reference to the final episode of "Life On Mars"]. However, it is not a person but a statue. In July 2007, several of artist Anthony Gormley's "Naked Man" statues were placed randomly around London. The "Sam" figure on the building was one of them. This figure was placed on top of the Hayward Gallery in the Southbank Centre.
Answer: Have you finished watching the entire series? I don't think it's fair to answer this for someone who hasn't.