Who is Agatha's son Nicholas Scratch? Marvel fan theories might spell out the identity of Agatha All Along's third-most mysterious character

Warning – the following features spoilers for Agatha All Along episodes 1 – 3... you have been warned!

In new Disney Plus series Agatha All Along, a spin-off from hit Marvel show WandaVision, it turns out that Joe Locke's Teen and Aubrey Plaza's Rio Vidal aren't the only characters who are shrouded in mystery – in fact, the show seems to have many, many secrets. 

That's because we also have questions surrounding Agatha's son Nicholas Scratch, a comic book character who has been referenced since the debut episode. The clues only deepen though with the most recent instalment, leaving us wondering whether we have perhaps already seen him on the screen.

Unsurprisingly fans have already put their tin foil hats on, coming up with numerous theories they are sharing online. Whilst some say that Teen is actually Nick – which would explain why he sought out Agatha given that she could be his mother – there is also the idea circulating that has everybody excited... or should that be, everybunny?

Is Señor Scratchy Agatha's son Nicholas?

In episode 2, Jennifer Kale (Sasheer Zamata) jokingly asks Agatha whether Teen is "another child sacrifice", which has led other fans to wonder what became of Nicholas – a theory supported by the promos that glimpse the Darkhold in a baby's crib. 

Then in episode 3, Jennifer pulls Teen aside and warns him not to trust Agatha. When he quizzes her as to why, Jennifer says that Agatha was rumored to have traded Nicholas for the Book of the Damned, a.k.a.. the Darkhold. If she gave up her own son to gain more knowledge and power, what might she be willing to do to her new coven?

Later on in 'Through Many Miles of Tricks and Trials', each witch – poisoned by the wine they’ve been forced to drink to move on to the next trial – suffers terrible visions representing their darkest fears. Alice (Ali Ahn) sees her mother, Jennifer sees the man who bound her, and Lilia (Patti LuPone) sees two death-like figures. 

Having initially resisted drinking the wine, Agatha guzzles down a glass and soon imagines a crib in the corner of the kitchen. She wanders up to it and pulls back the comforter, only to find the Darkhold inside. She stumbles back in fright but when the others ask her what she saw, she brushes them off. Guess it wasn't so much of a rumor after all.

"I do assume she sacrificed Nicholas in some capacity to get the Darkhold. But whether he died or was turned into a bunny or reincarnated into someone else still remains to be seen," tweeted Shawn AKA @wicklingstan. "Either way, it seems that could be the primary motivator for Rio and/or the Salem Seven."

"Okay so Señor Scratchy is definitely gonna be Nicholas Scratch turned rabbit," wrote Bronco AKA @upsidedwnbronco.

Plenty of others back the idea that Señor Scratchy, Agatha's pet rabbit, could actually be Nicholas, too. As someone else took to social media to point out, Nicholas' choir award, which can be seen in his untouched bedroom in detective Agnes' home in episode 1, stands next to a bunny ornament. Later, in Agnes' office, there's a blink-and-you'll-miss-it moment where a plant on a unit behind Agnes briefly turns into an old-school looking photo of a young boy, before reverting back to being a plant. The most interesting thing? Both the plant and the photo are next to another bunny decoration...

"What I would say is that there's a lot in the pilot to examine. It feels a little bit like a trick, and like something that we do and then we move on," showrunner Jac Schaeffer previously told The Wrap. "But it is worth a viewer's time to pay attention to what they’re seeing in the pilot."

In the comics, Salem's Seven are Nicholas's shapeshifting children, and given that they featured in the two-episode premiere, we can assume that Agatha's son is going to play a role going forward. It doesn't really seem like a coincidence that Teen randomly picks Señor Scratchy up in 'Circle Sewn with Fate/Unlock Thy Hidden Gate' right before he sees the septet descend upon Westview. Looks like it's going to be a while, though, before fans' theories are either debunked or proven right...

Like the onscreen version, Agatha has a complicated relationship with Nicholas in the source material, having grown up resentful of his mother – who was employed as a nanny for Reed Richards and Sue Storm – integrating herself into the outside, non-magical world. Nicholas often went up against the Fantastic Four and Agatha, inadvertently getting himself banished to the Dark Realm following one fateful fight.

Throughout his run, he was aligned himself with Mephisto and Dormammu, a name Doctor Strange fans will recognize, in his pursuit of becoming the Sorcerer Supreme.

Agatha All Along episodes 1, 2, and 3 are streaming now. Ensure you don't miss a thing with our Agatha All Along release schedule. For more on the wider MCU, check out our guide to all of the upcoming Marvel movies and shows or get up to speed with our breakdown of the Marvel timeline.