Justin's estranged brother visits in need of help. Still reeling from the death of his father, Mark makes a shocking discovery about his parents. Desperate to prove he can be a good step-dad, Nick tries some of Lewis's parenting advice.

Nick hits rock bottom when he loses his relationship, his home and his job. Abi and Gemma volunteer to teach sex education at the school, with disastrous results. Rachel relies on Abi and Gemma to deal with her pregnancy.