Marty McFly's red guitar from the original "Back to the Future" is missing and the movie's cast and filmmakers are asking for the public's help.

For four decades, a crucial piece of cinematic history has been missing. It’s the iconic cherry red Gibson ES-345 that Marty McFly shredded during the legendary Enchantment Under the Sea dance scene in Back to the Future—an electrifying moment that sparked a generation of guitarists and cemented the instrument’s place in pop culture.

Filmmakers went looking for the instrument while making the movie's 1989 sequel, but even now it's nowhere to be found.