S1, E5: The doorbell rings. It's TV vet Jack Underwood. He has received Adam and Sarah's letter and has come to help Wilfred with his behavioural problems. Jack spends some 'one-on-one' time with Wilfred who is on his best behaviour. Jack and Wilfred get on like old mates and laugh at Adam as he cleans the back seat of his car. Wilfred shows Jack his latest hole - a crater he can stand in. Jack: 'This is a beauty. Did you do this on your own? Geez, you must've been going through a rough trot'. Wilfred convinces Jack that he is of sane mind and it is Adam who has social problems. Jack gives Adam a dressing-down and convinces Sarah to let Wilfred sleep on the bed. Sarah apologises to Wilfred, who is already making himself comfortable on the bed. Adam can hold his silence no longer. He is of the belief that Wilfred manipulates her, makes him look like a villain and is trying to come between them. Sarah has never heard of anything so ridiculous and refuses to choose between the two. But if she did have to choose...