Pip's revising hard but is worrying about her exams. David doesn't want her to overdo it and assures her they just want her to do her best. He suggests Pip takes a break so they can look at the owl nest box. To Pip's delight there are five eggs. It's the day of the marathon and Usha's feeling nervous. Alan encourages her but wishes he hadn't joked about Usha beating Annabelle. Ruth's sure Usha won't take any risks. Once Usha's registered, her excitement grows. Annabelle's in the same starting group and is taking it very seriously. With the marathon under way, Annabelle soon gets herself ahead of Usha. But with six miles to go, Usha catches up and Annabelle is clearly in pain with her knee. Usha wonders if she should carry on but Annabelle can't let everyone down. Usha understands this and, to Annabelle's surprise, insists on finishing with her. Alan waits anxiously by the finish line with Ruth. They see Usha and realise that without her help Annabelle wouldn't have crossed the line. Annabelle's really gratefully and admits she doesn't know if she'd have done the same. Usha insists she would but, whatever, they did it. Episode written by Joanna Toye.