A father disowning his newborn baby leads Alex and Susie to suspect the mother, a schoolteacher, has been having an affair with a 14 year old schoolboy.

At first both parties deny a relationship, but when they run away together, the case is all but proven, it seems the realtionship has been going on since the boy was 13. On his 13th birthday in fact.

Meanwhile Joss feels sorry for a drunk he and Kelly find in the street and returns him home instead of charging him, overcoming the reluctance of his Russian speaking mother. Next day he finds himself in front of Tom—it turns out the drunk was completely unknown to the woman.

Meanwhile, Alex and Susie are on a stakeout when Alex makes a move on her. Susie ends up sleeping with him, and seems to have fallen for him. The next day, though, Alex learns that Jonesy does like Susie - despite his protestrations - and so Alex makes the decision to back off.

When the school teacher's husband comes to collect his wife and the newborn baby, it ends i