Uncle Fester uses his electricity to "jumpstart" Thing back to life. If you want more details on this specific episode: Fester’s powers and his history with the Addams family Evidence clues Wednesday missed along the way Dr. Kinbott’s profile and why she was targeted
Fred Armisen brings chaotic energy and electrical powers. [S1E7] If You Don't Woe Me By Now
The episode concludes with one of the show's biggest cliffhangers. Uncle Fester uses his electricity to "jumpstart" Thing