Tin, Pan, and Alley are a trio of siamese cats from the Tom and Jerry movies. In Tom and Jerry Meet Sherlock Holmes, they are local gravediggers/jewel thieves who work for Professor Moriarty. They are first seen stealing a priceless diamond in the middle of the night in London and bringing it to their master, Moriarty. They are seen again in the Twisted Lip pub while Miss Red sings for a crowd while Jerry and Tuffy tries to retrieve the diamond from the cats and Tom is undercover as a waiter. Unfortunately, the cover is blown, and the cats escape in time with the diamond and kidnap Jerry, leading Tom Cat to chase after the trio and rescue the little mouse.