The series, starring Aidan Gillen and Michael Malarkey, will air its season one finale on Feb. 26. 'Game of Thrones' standout Aidan Gillen, to-die-for costumes and UFOs -- what's not to love?

EXCLUSIVE: Aidan Gillen (Game of Thrones), Joe Alwyn (The Brutalist), Naledi Murray (Sweet Tooth), Ben Chaplin (September 5) and Sebastian Orozco (The Crow) round out the cast of Sam Esmail’s ...