The Lesson - S2-E3
Plot hole: At the end of the episode Trevor Speed sits with his face in his hands looking like the world has stopped turning. In fact he has just sold a worthless plot of land for £450,000. Okay, he was conned out of £150,000 of that by the grifters, but he is still £300,000 up. A grifter like him would be over the moon - he is used to taking elderly ladies for the occasional short con making him £80 or so. He's just won the lottery. He'd be happy.