Los Angeles: The fearsome dinosaurs from 1993 classic Jurassic Park are back for their fourth outing this week—and they’re genetically-modified and computer-animated to be more terrifying than ever.

Co-produced by Steven Spielberg—who directed the first two films—’Jurassic World’ takes us back to the island theme park where scientists have revived T-Rex and Co for paying customers.

Only this time, in a bid to rejuvenate the park’s dwindling fortunes, they have created a new hybrid dino that is particularly huge. And intelligent. And lethal.

So when the monster escapes from its pen, things go rapidly downhill, plunging the park into chaos.

In addition to Chris Pratt as chief dinosaur-keeper and Bryce Dallas Howard as the park’s overzealous marketing chief, the cast includes a multi-ethnic array of actors typical of Hollywood mega productions these days.

‘Jurassic Park is not an American film, it’s a film that belongs to the whole world and I thought it was important that when we reintroduce this film, to have people that represent the whole world,’ said director Colin Trevorrow.

He was referring to actors including Indian star Irrfan Khan, Frenchman Omar Sy and Chinese American B.D. Wong.

The latter is the only one who appeared in the original, whose stars Sam Neill, Laura Dern and Jeff Goldblum have all been replaced by a new cast for the first ‘Jurassic’ film since 2001’s ‘Jurassic Park III.’

The movie, with an estimated budget of $150-180 million—and a sequel for which is already in the works—is due out around much of the world this week, including the United States on Friday.

Spielberg’s original 1993 blockbuster used a combination of stop-motion filming with dinosaur models and primitive computer generated technology, which was unprecedented at the time.