In I Am Legend Will Smith plays "Robert" tries to find an antidote to the virus while defending himself against nocturnal mutants. In the film's last scene, he is surrounded by mutants and blows them and himself up with a hand grenade. The original ending was very different, however. It becomes clear that the mutants can think and feel. "Robert" frees the Alpha mutant woman and she is reunited with her lover, the Alpha mutant male. Once they are together they leave, taking all the other Dark Seekers with them...
