Warning: SPOILERS ahead for WandaVision episode 7, "Breaking the Fourth Wall." 

In true MCU fashion, WandaVision episode 7 has a post-credits scene, which sees Monica Rambeau encounter Pietro Maximoff, aka Quicksilver, as she snoops around the home of Agnes, revealed to be Agatha Harkness. While WandaVision has had some very lengthy end credits, it has so far eschewed having a post-credits scene like Marvel Studios' movies are famous for. Like so much of the show, however, that all changes at the end of episode 7.

In WandaVision episode 7, Scarlet Witch's new reality begins to glitch more than ever before, with things spiralling further and further out of her control - until it's confirmed, at last, that she was never in control to begin with. Agnes finally steps out of the shadows, confirming the long-held (if seemingly debunked) theory that she is actually the witch known as Agatha Harkness, and has been manipulating things from the very beginning. The episode's ending finds Wanda trapped in a basement with Agatha, but that's not all there is.

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In WandaVision episode 7's post-credits scene, Monica Rambeau, who is now fully powered up after passing through the Hex a third time (only by choice now), is on the trail of Wanda and Agnes/Agatha, and is about to find her way into the witch's basement, which glows purple as a sign of her power. She's caught, however, by Quicksilver, who until this point had been completely missing from "Breaking the Fourth Wall," as he pops up to surprise Monica and tell her: "Snooper's gonna snoop!" Agatha Harkness, in the recap of all the events she was behind, is confirmed to be the one who brought Quicksilver to Westview, and it's clear he's still well under her control now, working for her to stop people such as Monica from infiltrating her property.

WandaVision Episode 7 Post Credits Scene Monica Quicksilver

Since Monica is trying to help Wanda, then this would setup a fascinating fight for the next episode: Monica, imbued with her Spectrum powers (and even an outfit that nods to the costume), alongside Scarlet Witch vs. Agatha and Pietro. It's possible that will still happen, but it's also interesting that Monica's eyes appear to be a different color in WandaVision episode 7's post-credits scene. When she was powered up earlier, they glowed blue; in this moment, when she opens up the entrance to head down into the basement, they're a darker purple, fitting with the same color of Agatha Harkness' magic, seen in the vines on the staircase Monica is looking at. This suggests that, simply by being exposed to it, Monica could already have fallen under Agatha's magical spell and be controlled by her. Quicksilver's eyes aren't glowing, but that is presumably part of Agatha's magic itself, since walking around with purple eyes would be something of a giveaway.

If Monica is indeed under Agatha Harkness' control, then it further stacks the odds against Wanda and Vision, leaving the latter - alongside Darcy, unless she's still stuck at the lights - as the only hope for defeating Agatha and saving Wanda, Billy, Tommy (if the twins can still be saved, that is, as it's left unclear what happened to them), and the rest of Westview's inhabitants. The vines hint that Agatha is perhaps feeding off Westview, with the Hex and Scarlet Witch's powers imbuing her own, which means it's going to be an incredibly difficult hurdle to overcome in WandaVision's closing installments.

Aside from the finer points of what WandaVision episode 7's post-credits scene means for Monica, Quicksilver, Agatha, Wanda and so on, it's also the biggest indicator yet of the shift in the show's storytelling. For the most part, WandaVision hasn't operated anything like a typical MCU product, instead doing its own thing in a sitcom bubble. That's gradually changed as the show spent more time outside of the Hex with S.W.O.R.D., but with the real villain of WandaVision now revealed and the veil lifted, then the traditional post-credits scene returning hammers home that this can now fully be an MCU spectacular, setting up WandaVision's final two episodes to be bigger than anything else.

Next: All MCU Movie Connections In WandaVision So Far

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