Character mistake: Series 1, Episode 3: When Alex tells Ray she will re-trace his steps for clues linking to the murder of a girl, he says, "Don't worry, lads! Wonder Woman's here!" Alex replies, "FYI DI Carling." Ray is a DS, not a DI.
Character mistake: In the episode about the prostitute killer, observe the singers in the church choir. One of them hasn't a clue as to the lyric of "Oh Happy Day." Bloke in second row.
Answer: Have you finished watching the entire series? I don't think it's fair to answer this for someone who hasn't.
Bishop73