Here's how the latest episode of 'WandaVision' sets up the Marvel show's endgame

Warning: This post contains spoilers for the sixth episode of WandaVision.

With three episodes to go, Marvel's hit series WandaVision sets up its own Endgame in its sixth installment, "All-New Halloween Spooktacular!" Formatted as a Halloween edition of an early 2000s family sitcom like Malcolm in the Middle, the episode featured Wanda (Elizabeth Olsen), Vision (Paul Bettany), their kids Tommy and Billy and newly-returned Uncle Pietro (Evan Peters) wearing homemade versions of their vintage comic book costumes — a touch that Marvel fans appreciated.

But the episode also raised the emotional stakes for the characters on the show-within-the-show, as well as the Marvel Cinematic Universe observers standing outside the reality-warping Hex. Even as Wanda uses her Thanos-level psychic powers to keep the illusion of a sitcom suburb alive, the residents of Westview are starting to chafe against her mind control. That includes Vision, who ventures beyond the (fourth) wall of the Hex to beg the trigger-happy S.W.O.R.D. forces for help. But breaching that wall also causes his reanimated body to break down — another potent visual reminder that he's still a casualty of the Infinity War.

Meanwhile, Wanda spends Halloween in the literal company of death: Like Vision, Pietro is six feet under outside of the Hex — albeit in the form of Aaron Taylor-Johnson, not Peters, who has somehow been ported into Westview from the X-Verse. Unlike Vision, though, he has a clearer understanding of what Wanda's doing and why. "I'm not some stranger, and I'm not your husband — you can talk to me," he tells his sister, suggesting that he's already got a window into her grief-stricken mind. But there's still a lot he doesn't know, including how Wanda has marshaled her power to create this town-wide illusion. "It's a pretty big leap from giving people nightmares," he says, referring to one of the abilities she previously showcased in Avengers: Age of Ultron. Later on, he pointedly teases her when she freaks out about Vision venturing outside of the Hex: "It's not like your dead husband can die twice."

Pietro's half-sympathetic, half-mocking behavior is consistent with the Marvel Comics version of the character, who frequently displayed jerk-ish tendencies. But some fans are speculating that Peters isn't just playing Quicksilver — he's also Mephisto, the devilish trickster that many assume will still turn up before the series ends.

Frankly, S.W.O.R.D. is in for a devil of a time resolving this event even if Mephisto isn't in the meta-human mix. At the end of the episode, Wanda expands her reality beyond its current limits, swallowing up Darcy (Kat Dennings) and other agents in the process, turning them into clown-ish versions of their MCU selves. Now that she has more soldiers in her TV army, Wanda is prepared to make a stand against whoever remains on the other side of the Hex. Look for that looming battle to be the driving force behind the final three episodes — and we may just see an Avenger (or two) called in as series-finale reinforcements.

WandaVision is currently streaming on Disney+.

Read more from Yahoo Entertainment:

• Marvel universes collide on a very special episode of 'WandaVision' (spoilers!)

• Inside the big 'WandaVision' reveal: 'Episode 4 was always meant to be a reset'

• 'WandaVision': What you need to know about the bonkers ending of the Marvel show's third episode