Once a week, Disney+ presents a new episode of this latest Marvel TV series. Today is the penultimate episode, and it’s the installment that explains everything – the weird and shifting TV “world” of WandaVision, how Vision has risen from the dead to occupy this sitcom fantasy setting, and, as in Blue Velvet or Twin Peaks, what hidden evil lurks beneath the surface banality. When WandaVision premiered, I was hoping it would take the