Robert Wise's 1951 film was a condemnation of Cold War paranoia and a Christ allegory. Scott Derrickson's remake pulls off a few fine sequences, but there are no big ideas. The nearly omnipotent alien named Klaatu (Keanu Reeves) gets a trigger-happy response when he lands on Earth. Only the widowed Dr. Helen Benson (Jennifer Connelly) wants to make nice. But she may not be correct: Reeves' Klaatu is pissed at humanity for trashing the planet, and he's prepared to wipe us all out.