Mo finds coping with her pregnancy increasingly difficult with only Hanssen to confide in, and struggles with a big choice regarding her future. Already snowed under with a packed and understaffed AAU, Fletch finds himself treating a drug addict who makes light of his situation - and when Mikey strikes a bond with the patient, Fletch gets more than he has bargained for. Isaac resolves to impress Ric, but finds his confidence knocked when treating a loudmouthed teenager.