It’s October 21, 2015, the day in “Back to the Future II” when Marty McFly, Doc Brown and Jennifer travel to this very date. On the occasion of Back to the Future Day, we’d like to give a shout out to one of our favorite movie mutts, shaggy Einstein, who traveled into the future before Doc or Marty every did.

In “Back to the Future II,” Einstein’s keen sense of smell comes in handy when he tracks Jennifer to her house.

Einstein was played by Tiger in the first “Back to the Future” film, then a lookalike named Freddie took over the role in the second and third installments as Tiger had gotten too old for the job. Both dogs were trained by Richard Calkins, who also worked with the dogs in “Poltergeist,” “Racing With the Moon” and “E.T. the Extra-Terrestrial.”

What kind of a dog was Einstein? According to Culture is a Weapon, he might be a Berger Picard, a Briard, a sheepdog or just an adorable mixed breed.

According to Pajiba, Einstein didn’t do all his own stunts! A couple of long shots of the dog in the car were a stunt man in a dog suit; close-ups were the real dog. Producer Bob Gale called those scenes an homage to “The Shaggy Dog” (1959).