The casting news, initially reported by Deadline, brings a fresh wave of talent to 'Ascension,' a series poised to delve into the sinister world of cults and psychological torment. Amanda Plummer, known for her distinctive roles in films like 'Run' and 'Butterfly Kiss,' and television appearances, adds a compelling presence. Christopher Chung, who has impressed audiences in 'Slow Horses' and 'My Brilliant Career,' and T’Nia Miller, celebrated for her work in 'The Haunting of Bly Manor' and 'VisionQuest,' round out the new additions.

These actors join an already stellar lineup, with 'Outlander' star Caitríona Balfe leading the series as Rose, a relentless documentary filmmaker. Balfe, who also serves as an executive producer, portrays a character adept at uncovering others' truths but grappling with her own unresolved issues. The legendary Bill Nighy was previously announced to be part of the cast, promising a formidable ensemble.

'Ascension' is described as a one-hour psychological horror thriller, drawing its inspiration from Adam Nevill’s novel Last Days. The narrative centers on Rose as she embarks on a new project investigating a mysterious 20th-century cult known as the Church of Ascension. Initially finding an unexpected solace in its teachings, Rose soon uncovers a far more insidious reality beneath its surface. The series promises to explore profound themes of evil and innocence at the highest levels, questioning the lengths individuals will go to protect loved ones, even when the greatest threat might stem from within.

The creative vision for 'Ascension' is spearheaded by a robust team. Alfonso Cuarón, the acclaimed director behind 'Gravity' and 'Roma,' is deeply involved, serving as an executive producer and co-writing the series with Carlos Cuarón, James, and White. James is also set to take on the lead directing duties for the series. Production for 'Ascension' is handled by Apple Studios, Esperanto Filmoj, and Anonymous Content, with a host of executive producers including Gabriela Rodriguez, Richard Schwartz, Steve Golin, David Levine, Zack Hayden, James, and White, alongside the Cuarón brothers and Balfe.

With its intriguing premise, a blend of established and rising stars, and a creative team led by a visionary like Alfonso Cuarón, 'Ascension' is shaping up to be a compelling addition to Apple TV+'s growing slate of original content, promising a chilling and thought-provoking viewing experience for fans of psychological horror.