It was undoubtedly a tough assignment: how do you revive a moribund 40-year-old franchise in such a way that young bums will be planted firmly on cinema seats this summer? For most other fictional worlds, the answer would have been to simply hit the reboot button and start from scratch. But this is Star Trek – not just any old fictional world but an entire and richly detailed universe with a legion of fiercely protective fans for whom the scent of heresy is never far away. Assuaging these continuity freaks (or canonistas as they’re known) and attracting the new youthful audience that a blockbuster movie needs in order to succeed must have seemed like squaring the circle.