There's a big bang in the lab as the doctors show how genes make you who you are, and a new doctor joins the team! Find out more about her as Dr Ronx takes us behind the scenes of Homerton Hospital, where she works as a doctor in the emergency department. Meet two brand new Ouch patients and find out how to make a hole in your hand with a new body trick to try at home. Meanwhile, in the emergency department, Jay's got a double break in his leg and Hadi has cut his hand.