This time Professor Branestawm (Harry Hill) has a rival. He's not the only inventor in town. Can he beat the rascally Professor Algebrain (Steve Pemberton) in an inventing competition?When Lady Pagwell (Diana Rigg) dies, leaving a substantial sum to fund local inventing, it could mean the end of Professor Branestawm's money troubles.But scheming local councillor, Harold Haggerstone, (David Mitchell) will stop at nothing to thwart Branestawm and insists that Pagwell holds an inventing competition to decide who gets the money.So Haggerstone tries to hire his own, rival inventor. Professor Mary Oxford, from Cambridge (Rosie Cavaliero) fails to impress with a nuclear powered paperweight. The 'Invisibaliser' presented by Professor Awfulshirt (Matt Berry) causes havoc (and much invisibleness). But when Professor Alegbrain (Steve Pemberton), from an unspecified European country, turns up, Haggerstone thinks he's on to a winner. Branestawm, meanwhile, is having problems of his own. Not only is