I guess even Michael Bay must have realised that by the fourth outing, this franchise needed refreshing. To that end, the previously long-suffering cast have been allowed to hang up their screwdrivers and a new set of characters have been drafted in. They are led by "Cade" (an enthusiastic Mark Wahlberg). Now he just happens to buy an old truck and it just happens to turn out to be the long lost "Optimus Prime". Of course, there are still agencies hunting for the robots and soon he and daughter "Tessa" (Nicola Peltz Beckham) are on the run from a militia controlled by the manipulative industri...