Less than a week until the big day — “Back to the Future” day, a.k.a. Oct. 21, the day Marty (Michael J. Fox) and Doc (Christopher Lloyd) went into the future in the second installment of the film franchise.

To mark the occasion, Toyota made an ad campaign with the movies’ stars and has dropped a teaser for the full short film to whet everyone’s appetite.

In the video, Lloyd and Fox discuss what predictions from “BTTF II” have come true, like 3D movies and fingerprint technology, and which ones have not, like self-tying sneakers and dog-walking robots.

RELATED: Christopher Lloyd totally down for a ‘Back to the Future IV’

Fox also points out how hilarious it is they thought fax machines would still be around, though Lloyd says he has a fax machine.

“Who do you fax?” asks Fox. “I fax the people I fax,” says Lloyd.

“One guy in Ohio has a fax machine, do you fax him?”

The full ad drops Wednesday, Oct. 21.

Posted by:Andrea Reiher

TV critic by way of law school, Andrea Reiher enjoys everything from highbrow drama to clever comedy to the best reality TV has to offer. Her TV heroes include CJ Cregg, Spencer Hastings, Diane Lockhart, Juliet O'Hara and Buffy Summers. TV words to live by: "I'm a slayer, ask me how."