Set in the year 2018, Terminator Salvation depicts a “dirty, gritty, difficult” world set in the aftermath of a nuclear holocaust where human survivors are preyed upon by lethal robots. Directed by McG (Joseph McGinty Nichol) and staring Christian Bale, the fourth installment of the Terminator film series promises to “push the envelope” with its hi-tech visual effects. At a recent special preview of the movie held in central London, attended by McG, a five-minute trailer presented an action-packed montage of explosions and stunts, and revealed the range of robots featured in the film. Terminator fans can look forward to encounters with two-wheeled machines dubbed Mototerminators, tentacled Hydrobots and giant, armoured Harvesters.