S06E02 - Hickory Dickory Dock

An outbreak of apparent kleptomania at a student hostel is not normally the sort of crime that arouses Hercule Poirot's interest. But when he sees the bizarre list of stolen and vandalized items - including a stethoscope, some lightbulbs, some old flannel trousers, a box of chocolates, a slashed rucksack, some boracic powder and a diamond ring later found in a bowl of a soup - he congratulates the warden, Mrs Hubbard, on a 'unique and beautiful problem'. It is nevertheless not long before the crime of theft is the least of Poirot’s concerns.