Professor Branestawm is back! When Lady Pagwell (Diana Rigg) leaves a substantial sum to fund local inventing, it could mean the end of Branestawm’s money troubles. But scheming local councillor, Harold Haggerstone (David Mitchell) has other ideas, and hires a rival inventor, the evil Professor Algebrain (Steve Pemberton) to steal the cash and drive Branestawm out of business.