In The Flight Attendant season 2, episode 7, "No Exit," Grace St. James is revealed as the "Blonde Double" killer, who subsequently dies by suicide after confronting Cassie at the Santa Monica Pier. While Grace claims she was coerced, suspicion shifts toward CIA agent Dot Karlson as the true mastermind behind the murder plot. For a detailed breakdown, read the recap on Ready Steady Cut . The Flight Attendant Season 2 Episode 7 Recap: No Exit