Having learned nothing from the previous three movies (The Lost World and Jurassic Park III are essentially sidestepped), nor from Michael Crichton’s gene-pool text Westworld, the owners again find themselves running an amusement park in which the attractions eat the guests. As Bryce Dallas Howard’s operations manager struggles to locate her awol nephews, dino-trainer Chris Pratt attempts to prevent his unscrupulous security chief from weaponising the velociraptors with whom he has formed an interspecies bond.