Eco warriors Jesse Eisenberg, Dakota Fanning and Peter Sarsgaard fall apart while plotting to blow up a hydroelectric dam in this intense thriller.

The film’s first half is genuinely suspenseful, as neurotic loner Eisenberg, idealistic rich-girl drop-out Fanning and wily ex-marine Sarsgaard meticulously prepare to unleash their bomb, a speedboat packed with explosives made from fertiliser, on the target in Oregon.

But as each of the trio fall victim to guilt, fear and paranoia, the film reaches a whole new level of psychological tension.