David goes to Bridge Farm to borrow a tarpaulin for Ben's birthday assault course. Pat and Tony tell him about their visit to the lagoon waste treatment system. They're going to ask a consultant to visit. Eddie and Joe go to the Bull, with one of the chocolate bar wrappers. They look on a language identification website for clues to the ingredients, but the site only offers Latin as a possibility. Pat calls at the Dower House to ask Lilian to look after Jack for a few hours. Pat thinks Lilian doesn't seem herself. Lilian tells her she's caught Matt's cold, so Pat thinks she probably shouldn't look after Jack in that case. Matt appears, looking for the power drill. Pat goes and Matt tells Lilian he's keeping busy, putting up shelves. Lilian says Matt has plenty to do, like telling Russell to approach the SFO. Matt says he needs to speak to Chalkman. If he rats on Chalky, he'll have to plead guilty himself. Later, Matt says Chalkman's PA has promised that Chalky will phone. Lilian doesn't believe this. Maybe Chalky's talking to the SFO himself. Matt says he knows Chalky. He's lying low, thinking of a way out. Matt needs to stay in the game for now. Episode written by Adrian Flynn.