Infinity War reunites the Avengers gang and friends, including Iron Man (Robert Downey Jr.), Black Panther (Chadwick Boseman), Thor (Chris Hemsworth), Captain America (Chris Evans), Black Widow (Scarlett Johansson) and the Hulk (Mark Ruffalo), as they join forces with the Guardians of the Galaxy crew to
stop the
evil intergalactic despot
Thanos (Josh Brolin).