With Abby having been gone for about six months, Don and Eddie both want different women to move into the spare room. They decide to take them both out to decide who should get the room.
After Don starts dating a much older woman he finds it hard living in her grown up world. Sam becomes friends with a man from the university who is caught going through her draws by Don.
Sam invites her brother, Jamie to stay for the weekend. Jamie ends up in Don's bed following a heavy drinking session. When Don decides to find out if he is gay he asks Jamie to go to a gay bar with him.
So that he can prove to Sam and Eddie that he's fit Don decides to join a local gym. Don finds it much harder than he thought and passes out after a go on a running machine. After he decides that the gym isn't for him he decides to have colonic irrigation instead.
Don wants Sam to pretend to be his wife for the day when he has to attend an old friend's wedding. Don's friend though is not the same as he was like at school.