Rampage

An experimental DNA-altering serum falls to Earth from a destroyed space lab in this tepid adventure, causing a big-hearted and friendly albino gorilla called George to morph into a violent monster twice his normal size. As the military moves in to quell the bad-tempered beast when he breaks free from his enclosure, George's primatologist carer (Dwayne Johnson) and a discredited geneticist (Naomie Harris) face the obligatory race against time to find an antidote - not just for the ape, but for an equally savage juggernaut-sized predator infected by the space debris. The over-reliance on explosions, destruction and gunfire betrays the film's origins as a video game, but the impressive action sequences are also undermined by reams of clunky exposition and atrocious dialogue delivered by actors seemingly along for the ride and with no worries over the lack of quality control. At least Jeffrey Dean Morgan's shadowy government enforcer provides cartoonish fun, compared to the thick ham of Malin Akerman and Jake Lacy as evil sibling industrialists.