The real killer in the HBO Max series The Flight Attendant is Buckley. He is later revealed to be Feliks, a professional assassin.
The Identity of the Killer
Throughout the first season of The Flight Attendant, Cassie Bowden finds herself embroiled in a dangerous mystery after waking up next to a dead body with no memory of what happened. Initially, suspicion falls on various characters, and Cassie herself is a prime suspect due to her drunken blackouts. However, the true culprit is eventually unmasked as Buckley.
Buckley, who initially forms a relationship with Cassie under false pretenses, is revealed to be the killer involved in the conspiracy that drives the series' plot. His actions become increasingly threatening as Cassie gets closer to the truth.
How Buckley's Guilt Was Revealed
Buckley's true nature and his role as the killer are confirmed through a series of escalating events and key discoveries:
- Following and Kidnapping Attempts: Buckley actively pursues Cassie, even following her to Rome where he attempts to kidnap her, demonstrating his dangerous intentions and connection to the overarching crime.
- Assault on Miranda: In a crucial confrontation, Buckley physically assaults Miranda, further solidifying his violent capabilities and involvement.
- Exoneration of Cassie: The turning point comes when Annie, Cassie's best friend and a lawyer, obtains and turns over a crucial flash drive to federal agents Van and Kim. This evidence ultimately exonerates Cassie and leads them all to the undeniable realization that Buckley is the true killer.
His actions and the evidence presented confirm that Buckley was behind the murder that initiated the entire mystery, pulling Cassie into a web of international intrigue and danger.