Marvel Studios delivers the ultimate comic-book film, which ties together such characters as Iron Man ( ), Captain America ( ), The Hulk (Mark Ruffalo), and Thor ( ) for a big-screen franchise team-up like no other. Taking center stage this time is Nick Fury (played once again by the note-perfect ), leader of the peacekeeping agency known as S.H.I.E.L.D. Fury, along with former Russian spy Black Widow ( ), recruits a super team to combat Thor's ever-deceptive brother Loki ( ) after he brainwashes ace archer Hawkeye ( ) while stealing a cosmic cube from an underground base. Thus the heroes must learn to work together alongside outlaw scientist Bruce Banner (Ruffalo), who can track down the artifact's gamma signals when he's not hulking out into a giant green monster. Show runner ( , ) adapted and helmed the script by .