It is with tacit awareness of this customary recourse to special effects artistry — and the mediocrity of 1997's The Lost World: Jurassic Park and 2001's Jurassic Park III — that Spielberg, as an executive producer, gives Jurassic World a self-reflexive spin. Directed by Safety Not Guaranteed's Colin Trevorrow, this fourth instalment does well to supplement the 3D spectacle with lively characters and good humour.