Callum Blue is looking back at his time with NXIVM.

The “Smallville” actor appears in the upcoming “E! True Hollywood Story” episode about NXIVM, where he opened up about the sex cult and how he became involved with the organization.

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Blue’s “Smallville” co-star Allison Mack recently pleaded guilty to racketeering charges in relation to the organization, while founder Keith Raniere was indicted on sex trafficking and racketeering charges in 2018.

“At the height of my popularity, I went through some trauma. My father took his own life and I continued working and I was caught up in this spiral of chaos because Hollywood can be a chaotic and noisy place,” Blue, 42, explained.

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Blue says that NXIVM’s self-improvement workshop called Executive Success Program, or ESP, piqued his interest but didn’t know the classes were used as a recruiting platform for a secret society. According to The New York Times, ESP trapped unsuspecting women they “branded and forced into sexual slavery.”

Blue and Mack weren’t the only “Smallville” stars involved. Their co-star Kristin Kreuk claims she was only there for the “self-help/personal growth.”

“E! True Hollywood Story” returns this October.