In 'Fanatical: The Catfishing of Tegan and Sara,' director Erin Lee Carr tells the strange story of how the twin-sister pop duo was hacked and the digital con artists who impersonated them.

Tegan in “Fanatical: The Catfishing of Tegan and Sara.” (Disney) Tegan believes that Fegan is still out there perpetuating lies as an imposter on social media, harassing their fanbase.

Fanatical: The Catfishing of Tegan and Sara will release on Hulu on Oct. 18. Read More About: Hulu; Tegan and Sara; THR Newsletters Sign up for THR news straight to your inbox every day.

But in Erin Lee Carr’s Hulu whodunnit documentary, "Fanatical: The Catfishing of Tegan and Sara," their fans' closeness began creepily bordering on something else.

As Fanatical’s timeline spirals forward through Tegan and Sara’s career, viewers come to understand the backbeat of suspicion and fear that has run parallel to their success. “I felt so ...

In the film, Tegan and Sara discuss how unsafe they felt throughout the ordeal. “We were extremely worried for our fans talking to this person,” one of them (who isn’t on camera) says.

Erin Lee Car's latest true crime documentary "Fanatical: The Catfishing of Tegan and Sara" delves into a hacking nightmare. Review.

With their new documentary Fanatical, Tegan and Sara investigate a years-long stalker and interrogate fandom’s current role in the music industry.

Tegan and Sara are opening up about their experience with a catfishing stalker in interviews and the upcoming Erin Lee Carr documentary ‘Fanatical.’ ...

In 'Fanatical: The Catfishing of Tegan and Sara,' director Erin Lee Carr tells the strange story of how the twin-sister pop ...

In Fanatical: The Catfishing of Tegan and Sara, the musicians and the moviemaker come together to investigate a case that's less violent, but nonetheless haunting.Seeking to catch the hacker ...