The new one-way system in Oakhill causes traffic congestion in the Street as people use it as a short cut. Martin starts back at college and is worried about meeting Carmel again. Lisa is embarrassed when her parents plan to turn a bedroom into a nursery. She tells them that she's leaving to live with Des. Jeff Horton is furious and accuses her of wanting to hurt the Duckworths. Jeff refuses to let her go. Alf is annoyed that delivery man can't park outside the shop as everyone ignores his sign. Mark tells Tracy he's sure that Ken and Maggie will get married. She is uncomfortable when he tells her that she's lucky to have a dad. She tells him that he has got a dad and his name is Mike Baldwin. Mark is stunned. Lisa swears to her parents that Des loves her and will look after her. They tell her that she's probably got post-natal depression and try to get her to see a doctor. Jeff calls her a slut, accusing her of sleeping with Des whilst she was living with the Duckworths. Lisa refuses to listen anymore. Steve passes his second driving test and shows everyone his certificate. He apologises to Vicky about seeing Susie Johnson, telling her that he did it out of spite. She is pleased and agrees to go out with him. Martin is glad when Carmel ignores him all day. Maggie calls the Police sick with worry when Mark stays away after school. He returns at 7.00pm and stuns her by asking her if Mike is his real father. He begs Maggie to tell him that Tracy was lying but she can't. Mark is devastated. Maggie tells Ken that she blames him and his family.