A new special constable, Saskia, arrives and is paired with Howard. It slowly becomes clear that they are brother and sister and Saskia wants to know why Howard and their mother are so at odds.
Rob’s trying to organise a leaving do, so Saskia and Howard both try to organise something, but Howard is interrupted when Rob sends him out to the case of an old woman who has had her purse stolen.
Back at the station, Saskia tells Howard how she has booked a tribute band, but Rob soon realises that the tribute band were the purse stealers and are now in the cells. Howard cannot believe it when it gets worse, as Saskia drags him up for the pair of them to step in and perform karaoke. Howard admits that he has missed his sister, and that he will give their mother a call.