by Ken Whitmore
Colonel Grace's house-guests include a number of people who are experienced at breaking and entering. He decides to offer a prize of ã1,000 to the one who can get into his intruder-proof library, which is protected with a deafening alarm, heavy security locks and a guillotine device that would slice in half anybody attempting to enter unannounced.
BBC Manchester
(Repeated: Mon 3.15pm)