The Grimleys (1999)

S2E12 Gomez, the Cat Burglar

Gomez finds himself sleepwalking due to Grandma's notorious yak stew, leading to mayhem at home. The situation escalates when a link is discovered between Gomez's nocturnal escapades and a series of recent cat burglaries. Morticia takes it upon herself to find a solution before Gomez is apprehended and labeled a criminal.