Christopher Chung Joins Caitríona Balfe in Apple TV+ Cult Horror Series Ascension

Christopher Chung, known for his role as the tech-expert Roddy Ho in the acclaimed series Slow Horses, has officially joined the cast of Apple TV+’s upcoming series Ascension. Chung enters the production as a series regular, marking a significant tonal shift from his comedic work to a high-stakes psychological horror thriller.

The series is a major television follow-up for lead actress Caitríona Balfe, serving as her first primary TV project since the conclusion of the long-running drama Outlander in May 2026. While the series has been framed as a spiritual successor for Balfe’s career, Ascension moves away from historical romance into the realm of supernatural dread and investigative mystery.

The series follows a documentary filmmaker's investigation into the Church of .

A Tale of Cults and Documentation

Inspired by Adam Nevill’s 2012 horror novel Last Days, Ascension follows Rose, played by Balfe, a documentary filmmaker and recently divorced mother. The narrative centers on her investigation into the Church of Ascension, a mysterious 20th-century cult. As Rose delves into the group’s history and its charismatic leader, the investigation takes a dark turn, suggesting the cult’s influence may not be confined to the past.

The creative team behind the series includes showrunners Natalie Erika James and Christian White. James, who gained recognition for the horror film Relic, is also serving as the lead director. The project is executive produced by Oscar winner Alfonso Cuarón under his Esperanto Filmoj banner.

Expanding the Series Ensemble

The casting of Chung coincides with several other high-profile additions to the series. Bill Nighy has joined the cast as Zac, a fellow documentarian who works alongside Balfe’s character. Apple has also confirmed that Amanda Plummer and T’Nia Miller will appear as series regulars, though specific details regarding their characters and Chung’s role remain under wraps.

transitions from his tech-expert role in Slow Horses to this psychological thriller.

For Chung, the role comes at a busy time in his career. He is currently appearing in Slow Horses Season 6, which began airing new episodes in October 2026. Transitioning from the dry humor of the Slough House hackers to the cult-focused horror of Ascension represents a pivot toward prestige genre television for the actor.

Given the pedigree of the creative team and the timing of the casting, Ascension is positioned as one of the platform’s most anticipated entries into the psychological thriller space for the upcoming broadcast year.

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