Paul Bettany promised a couple of weeks back that the fourth episode of WandaVision would blow your mind, and he wasn't too far off. "We Interrupt This Program" did largely that, diverting away from the strange goings on in WestView to give some backstory as to how S.W.O.R.D. ended up there in the first place, and it's all tied back to Thanos, from Monica Rambeau's five-year absence to Wanda Maximoff mourning the death of Vision in a very unique fashion.