Listen to the sound clip At once. from Legion (2017) - Season 2: At once. At once. This sound is from Legion (2017) - Season 2 Legion is a thrilling television series that first aired in 2017. Created by Noah Hawley, the mind behind the critically acclaimed Fargo series, Legion quickly garnered attention for its unique take on the superhero genre. The show takes p… Go to the full soundboardwith more sound clips Search