WandaVision episode 6 is a Halloween spectacular that's absolutely jam-packed with MCU Easter eggs and Marvel Comics references. WandaVision started with a slow-burn approach, but Marvel Studios' first Disney+ TV series is now clearly building towards a dramatic climax. Many of the mysteries have been revealed - not least that Scarlet Witch is indeed the one responsible for creating Westview's sitcom-based false reality - but there are still so many unanswered questions.

The stakes increase dramatically in WandaVision episode 6. Thor films, showing she earned her doctorate and has skills as a computer hacker to boot. Meanwhile, Vision's own fears and suspicions lead him to take drastic action, with shocking results that ultimately leave Director Hayward exposed and SWORD dramatically diminished.

Related: Marvel Confirms When WandaVision Is Set In The MCU Timeline

The main story beats in WandaVision episode 6 are spectacular, but at the same time the story is jam-packed with cool Easter eggs and comic book references. Many of these pay homage to the history of the characters, while others shine a fascinating light upon the plot.

Scarlet Witch Is Wearing Her Comic Book Costume

WandaVision Scarlet Witch Costume

WandaVision episode 6 sees Wanda Maximoff don the costume of the Scarlet Witch from the comics, and it certainly proves why Marvel Studios tend to avoid straightforward page-to-screen outfits. Suffice to say this design - which Wanda wore in the comics during her time with the Brotherhood of Evil Mutants and her early years with the Avengers - looks far better as a Halloween costume than it would in a blockbuster movie. Interestingly, Wanda suggests in the MCU this is the traditional garb of a Sokovian fortune teller. This mirrors the comics, where for years Wanda thought her mother Natalya was a fortune-teller - recently learning Natalya was the previous Scarlet Witch. This particular Easter egg may look like fan-service, but it has the potential to be quite important down the road.

Vision Is Wearing His Comic Book Costume

WandaVision Vision Costume

Vision, too, dons a Halloween outfit styled like his traditional comic book costume. The overall design is absolutely hilarious, right down to the diamond shape where - in the MCU - the Mind Stone is positioned. Vision claims this was the only thing in the closet when he got up in the morning - Wanda rewriting reality to force him to participate in Halloween - but later he seamlessly transitions between the costume and his MCU look. This reality is a lot more unstable than even Vision realizes.

Quicksilver Wears His Comic Book Costume

Pietro and Wanda talk in Halloween outfits in WandaVision

The comic-book-accurate (if hilarious) designs of Vision and Scarlet Witch had been much teased in adverts for WandaVision, but the introduction of Evan Peters' Quicksilver was kept a lot more secret. As such, one of the delightful surprises in WandaVision episode 6 is that even Pietro Maximoff dons his comic-book-accurate costume - and he even gets the same insane hairstyle Quicksilver has sometimes had in the comics too.

Related: Theory: Evan Peters' Quicksilver Is WandaVision's Real Villain

Even Billy & Tommy Wear Their Costumes

Billy and Tommy as Wiccan and Speed in WandaVision

Remarkably, even Young Avengers arc of some kind, so hopefully it won't be the last time these two are seen in costume - although next time it will be played straight, rather than something of a joke. Amusingly, Tommy is initially reluctant to wear a costume, insisting he's the "cool twin." That seems to be a joke on the lack of superhero outfits in Fox's X-Men films, given he's clearly trying to be just like his uncle Pietro.

Billy & Tommy's Powers

Billy and Tommy Powers in WandaVision

The twins Billy and Tommy possess the same powers as Scarlet Witch and Vision. Tommy promptly uses his abilities to race through Westview at super-speed and carry out pranks - very much true to his comic book iteration - while Billy senses Vision's impending death. It's interesting to note he appears to possess telepathy and telekinesis, but so far hasn't demonstrated the reality-warping powers Wanda is displaying in WandaVision. Again, that detail may be significant, given Wanda can't how she got a power-up in the first place.

The Twins Are "Demon Spawn"

WandaVision Billy Tommy Wiccan Speed Young Avengers Setup SR

Quicksilver jokingly refers to the twins as "demon spawn," a line of dialogue that may seem like just a joke - but is actually rather on the nose. In the comics, Scarlet Witch created Billy and Tommy using fragments of Mephisto's soul - a character who is literally Marvel's representation of the Devil, a senior demon who rules over a Hell Dimension. So in the comics, these two were quite literally "demon spawn" - although it remains to be seen whether the same is true in the MCU as well.

The YoMagic Advert

WandaVision YoMagic Advert

The adverts in WandaVision have always had sinister undertones, but the one in episode 6 is particularly striking. Where earlier ads have referenced events in Wanda's life, the YoMagic ad appears to sum up the general theme - the idea that, for all her power, Wanda has been unable to drive back death itself. Now, though, she has unlocked the magic that lay within her - and she is attempting to reverse all her losses.

Pietro Reverts To An American Accent At Times

Ralph Bohner (Evan Peters) dressed as Quicksilver in WandaVision

Evan Peters is, of course, the Avengers: Age of Ultron. For one thing, in the X-Men films Quicksilver was brought up in America, and has an American accent. As Wanda notes, when he loses control during an argument Pietro reverts to an American accent, seeming to confirm this really is the Quicksilver of another dimension dragged into the MCU.

Related: Why WandaVision's Quicksilver Is Evan Peters, Not Aaron Taylor-Johnson

The Incredibles & Parent Trap Are Showing At The Cinema

WandaVision Cinema Showing The Incredibles and Parent Trap

Look closely at the cinema billboards behind Scarlet Witch and Quicksilver, and you'll see the movies showing are The Incredibles and The Parent Trap. As anachronous as that combination may be, it's quite appropriate; The Incredibles is a Pixar film about a superhero family, including a young super-speedster, while The Parent Trap involves two people switching identities - and accents.

A Mention of Shangri-La

Marvel Mystery Comics 45 Cover

There's a throwaway mention to the mythical land of Shangri-La, which in the comics is actually a real place - and was founded by Vision in an arc that has never been explained. In Marvel Mystery Comics #45, Vision was portrayed as the immortal guardian of Shangri-La, the one who discovered the secret of eternal life and strives to prevent the unenlightened attaining it. It's therefore quite amusing to see Shangri-La mentioned in WandaVision.