Poor Sparky only gets to be in a single episode of WandaVision before he sadly meets an untimely end. He escapes from the house whilst Wanda is distracted by a S.W.O.R.D drone, and unfortunately, the Maximoffs do not find him in time. They see their neighbor Agnes outside her house holding a towel, and she confirms the worst. Apparently, Sparky ate from the poisonous azalea bushes outside her house and tragically died. However, it's later revealed in episode 7 that Agnes deliberately killed Sparky.