Ryan Reynolds and Kenneth Branagh team up in “Mayday,” a genre-bending, action-packed buddy comedy that flips the spy thriller on its head. When hotshot U.S. Navy pilot Lieutenant Troy “Assassin” Kelly (Reynolds) is sent on a top-secret mission into Russian territory at the height of the Cold War, the operation implodes, leaving him stranded behind enemy lines. Discovered by Nikolai Ustinov (Branagh), a gruff ex-KGB agent with a penchant for American culture, Troy thinks he’s toast — but could an unlikely alliance between the two lead to Troy’s rescue and a bond neither saw coming?