Simon's done some rotten things in the past, but it seems he's about to outdo himself by becoming Weatherfield's youngest drug-pusher when he supplies Summer with a dodgy-looking cigarette he claims to have found at school.
Feeling emotional on what would have been her dad's birthday, Summer smokes it - and then passes out in the ginnel. When Billy finds out from Peter exactly what has happened, he snaps and punches him. Todd is horrified by his actions - after all, it could result in them losing custody of the youngster - but will Peter be willing to forgive and forget?
Chesney also has another health scare, during which he's rushed to hospital. While there, he learns that his son Joseph has been taken ill in Portugal, prompting him to leap from his sick bed and fly out to be by his side. His dedication makes Sinead see Chesney in a whole new light.
Meanwhile, Mary tries to prevent her family returning to South Africa and Gina feels guilty about supporting Kirk.