Fraudsters have been trying to get away with forging the classics for centuries. Jonathan Bate investigates how and why they did it and asks if it is still possible to get away with it. Ever since his death, Shakespeare's body of work has been credited with alleged additions by some unscrupulous experts. With the help of the Royal Shakespeare Company, Jonathan Bate has some fun hearing the imitations, and the experts try to show how they tell the real from the fake. Repeated on Sunday at 12.15am