Mark learns of his Jewish heritage. Stephen shows up drunk and throws a plant through Mark and Lorna's window. Mark confronts both Stephen and Lorna about the mysterious Teddy, but gets a straight answer from neither. Mark flashbacks to the first time he was almost unfaithful to Lorna (with a prostitute) and sleeps with Danni for the second time.
Mark has a recurring dream about a rat. Danni starts seeing a divorce lawyer. Lorna's sleeping pill causes her to begin sleepwalking, which leads to Mark losing a lot of sleep. Mark learns the truth about something in his past and breaks up with Danni... but maybe not for good.
Mark and Lorna celebrate their seventeenth anniversary. Mark discovers who Teddy is from an unlikely source... The truth about Lorna's addictions comes out. Danni makes a startling revelation to Mark, forcing him to make a decision about where his life is headed.