Jem is the grandson of Lewis Crabb and son of Pheobe Crabb. Pheobe was 16 when she conceived him and 17 when he was born. Jem's name only "coincidentally" sounds like Gemma, it was Phoebe's way of thanking Gemma for all her help and support without really saying it. Had trouble drinking his bottle at first but took to it when Lewis found the right teat. First appears in series one episode ten.