Although most fans have given up on the idea of Back to the Future Part IV, franchise star Christopher Lloyd is still up for a sequel.

The beloved 1985 sci-fi classic starring Lloyd as Doc Brown and Michael J. Fox as Marty McFly inspired two sequels, released back to back in 1989 and 1990. Since then, rumors have occasionally swirled about a fourth entry. Sadly, as the years have gone one, the DeLorean has remained locked in Doc's garage.

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Although director Robert Zemeckis has said that Back to the Future Part IV is a non-starter, it hasn't stopped Lloyd from wanting to hop in that iconic car for another trip through time. Speaking to the Phoenix New Times before a screening of the original movie, the 79-year-old actor confessed, "I'd be delighted. I'd love to be in a fourth film, if they could come up with the right idea that extends the story and does it as well as the first three."

However, Marty lacing up his Nikes doesn't depend on Lloyd. He continued, “It’s important if Bob Zemeckis and Bob Gale are excited about doing another episode." As will all such things, it would completely depend upon the story. “I think, really, the most important thing is if they can come up with the right idea. I think that's the challenge is to come up with something that really is as good as the originals," Lloyd said.

As for turning the Back to the Future trilogy into a tetralogy, Lloyd lamented, "I suppose it could happen. I have not heard that they're looking for that, if they've made up their minds... ‘hey, here's something we could do,’ and they believed in it then they might get going to do it.”

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Back to the Future was a big hit for Zemeckis and Gale, and even if the sequels weren't quite as popular, they still made a fortune for Universal Pictures. Lloyd frequently reprises his role as the mad scientist, appearing as Doc Brown in everything from TV spots to movies like A Million Ways to Die in the West and the 2015 short Doc Brown Saves the World.

Only last month, fans were tricked by a Michael J. Fox Facebook page that teased a fourth movie was in production, but the page had shared a picture from Back to the Future actress Lea Thompson's Instagram from 2015.

There are several stumbling blocks for a fourth movie. Alongside Zemeckis and Gale wanting to preserve the series as is, there is also the health of Michael J. Fox to consider. Diagnosed with Parkinson's disease in 1992, Fox has focused much of his attention on activism. Although he has starred in the likes of Designated Survivor, the man behind Marty McFly tends to stick to TV shows these days.

In an era of reboots and remakes that include GhostbustersMen in Black and Top GunBack to the Future seems ripe for a continuation or to usher in a new era of the franchise. While Lloyd and the legions of fans may be on board for more, it doesn't look like Back to the Future Part IV is going to be hitting 88 mph any time soon.