Haunted Mouse (S03E11)

Left in charge of a magical ring by his young wizard master, Tom is horrified when the ring gets stuck on Jerry's head - and the little mouse takes off into the big city! Befire you can say "abracadabra", the sorcerer's ring is spouting a torrent of mischievous magic, and Tom and Jerry are up to their ears in the most hilarious escapade of their lives! (official distributor synopsis)