As David moves out of Pete's Jo moves in; after quitting her job she cannot pay rent and her landlord has evicted her. Adam and Rachel show Laura her bedroom and later tell the adoption agent of Rachel's pregnancy. This does not sit well with her and she tells them the adoption cannot go ahead as it is not in Laura's best interests to live with them, devastating them. David and Karen attend a party, where she meets Mark Cubitt (Sean Pertwee), a publisher who asks her to edit a book his wife, Geraldine, is writing. Pete, David and Adam join Jo's aerobics class and Pete and David later go running with her. Pete slowly falls in love with her, but is alarmed when she starts seeing someone, Suggs (Paterson Joseph) from his work. Rachel and Adam see a solicitor about contesting the adoption agency decision, but are resigned to the fact they have to let Laura go.

Rachel returns, ready for sex, but is worried Adam no longer finds her attractive because of her size. Karen meets Mark at a hotel where he has booked a room. She tells Rachel of her feelings for him and she tells her to do what she has to. At the book launch, Geraldine tells Karen that Mark has had many affairs before this one, though Mark later tells her he will leave Geraldine to be with her. Pete avoids sex with Jo, worried that she will not find him attractive naked. David's boss Natalie tasks him with making a list of redundancies. Hard pressed to come up with a good list, he puts everyone's name down, including his own, but accidentally emails it to the rest of the office. When the head of the company sees it, he fires Natalie and promotes David. When Jo's visa expires, she decides to go back to Australia, thinking he does not like her. He follows her and she proposes to him.