WARNING: The following contains spoilers for WandaVision Episode 8, "Previously On," streaming now on Disney+.
In the latest episode of WandaVision, Agatha Harkness takes Wanda on an emotional, supernatural trip down memory lane to discover the origin and extent of her powers. While Wanda thinks everything she's become is due to Hydra's Mind Stone experimentation on her, Agatha believes it stretches way back to adolescence and there's a mystical twist to who she is and what she can really do.
As they revisit the bombing in Sokovia that took her parents' lives, it's revealed her abilities existed way before Hydra and that ultimately, they were responsible for taking care of the young twins in their most dire time.
When Agatha whisks Wanda to her old home, the audience gets insight into the Maximoff family's love of sitcoms, which the dad peddled as a DVD salesman trying to make ends meet. However, their viewing of The Dick Van Dyke Show is quickly interrupted by an explosion, leaving the kids trapped under the rubble next to an undetonated Stark Industries bomb. They realize their parents are dead, leaving Pietro scrambling to find a way out for them.
However, after repeatedly seeing Rob's mind playing games on him in the "It May Look Like a Walnut" episode, Wanda believes all of this is just her imagination. The fact the TV's still on despite the blast leaves her thinking the explosion is all a bad dream she can wake up from. Wanda reaches out to disable the Stark Industries bomb, and while what she did to it isn't' shown, Agatha reveals she disarmed it via a hex probability. It seems that Wanda repressed all this in her mind as she couldn't deal with the grief of her parents dying — that is, not until she and Pietro became terrorists years later.
But there's another big moment right after. Agatha walks around, surveying the damage and asking Wanda how she and her brother survived for so long. Wanda says it was only for two days, which was touched on in Age of Ultron as she spoke of how being trapped there without food and water staring at the Stark bomb made them want to kill Iron Man so much.
But Agatha dismisses that, hinting they were there for much longer. She suggests due to Wanda's bloodline, one that's descended from witches, she subconsciously cast a godlike spell to protect her and Pietro's life essence.
Agatha confirms later on all this — as well as her manipulating Westview into her own reality — is due to Chaos Magic and that Wanda is the Scarlet Witch. This hints, like Jean Grey and the Dark Phoenix, she's some sort of Chosen One who always had unique latent abilities inside her, not even aware when she was using them.
Written by Jac Schaeffer and directed by Matt Shakman, WandaVision stars Elizabeth Olsen as Wanda Maximoff/Scarlet Witch, Paul Bettany as Vision, Randall Park as Agent Jimmy Woo, Kat Dennings as Darcy Lewis, Teyonah Parris as Monica Rambeau and Kathryn Hahn as Agnes. New episodes air Fridays on Disney+.