Gunpowder, Treason…and Syon. Episode 3. The door burst open. The soldiers stormed in. The Gunpowder Plot had been betrayed. Guy Fawkes was captured, tortured in the Tower of London, and forced to confess. The leaders, Thomas Percy and Robert Catesby, were shot. But back at Syon, suspicion lingered. The Wizard Earl was accused of knowing more than he admitted, his cousin was among the plotters, the cellar was rented in his name, and his Catholic ties ran deep. Guilty or not, he paid a heavy price