Executive producer Shawn Levy has dismissed a longstanding fan theory suggesting that the character Kali from Stranger Things Season 2 was intended for her own spin-off series. Kali, also known as Eight and portrayed by Linnea Berthelsen, first appeared in the episode 'The Lost Sister,' where she reunited with Eleven in Chicago. Levy clarified that the episode was simply a bold creative choice, not a backdoor pilot.
In an interview for the SFX Holiday Special, Shawn Levy addressed speculation that has persisted since Stranger Things Season 2 aired in 2017. Fans theorized that the standalone episode 'The Lost Sister' served as a test for a potential Kali spin-off, with one Redditor noting, 'It seemed to be a backdoor pilot to test if [Kali] & crew could be a spin-off series.' Levy firmly dispelled this idea, stating, 'Let me dispel that notion. It was a risky bet to try a standalone episode with largely new characters in the middle of our second season. It worked for some viewers. It didn't work for others, but I respect the hell out of [series creators] the Duffers for taking that big swing.'
The episode follows Eleven (Millie Bobby Brown) as she travels to Chicago to connect with Kali, her 'sister' from the lab experiments, and joins Kali's gang for a brief adventure before returning to Hawkins. This detour provided character development for Eleven, exploring her search for identity and family outside her usual circle.
The Duffer Brothers, Matt and Ross, had previously discussed the episode's risks in a 2017 Entertainment Weekly interview. Matt Duffer explained its importance: 'Whether it works for people or not, it allows us to experiment a little bit. It's important for Ross and I to try stuff and not feel like we're doing the same thing over and over again. ... It was really fun to write and cast and work on.' Despite mixed reception, the episode was deemed essential for Eleven's growth.
Kali's return in the upcoming Season 5, set to conclude the series, keeps interest alive in her storyline. Levy's comments come amid anticipation for the final season, emphasizing the show's commitment to innovative storytelling over franchise expansion in this case. This debunking highlights how fan theories can shape perceptions of narrative choices in long-running series like Stranger Things.