Alison organises a sponsored walk to raise money for Joe's class. Volunteering brings the family back together, and also provides Alison with a chance to get to know Heather better. But on the day, Joe refuses to leave his room, the pressure of being the centre of attention proving too much for him. Rebecca comes to his aid and shows him that the walk is not a thing to be feared, and in turn gains the confidence to talk about her feelings concerning her pregnancy and the possibility that her child may also be autistic.