EINSTEIN (Freddie), in the Back to the Future franchise, is the latest in a long line of lovable mixed-breed dogs owned by Emmett L. Doc Brown. Einstein takes part in the first test of Brown's time machine, riding in a radio-controlled DeLorean DMC-12 and losing a minute without even realizing it.Einstein is along for the ride when Doc Brown demonstrates how to change history to Marty McFly and his future wife, Jennifer Parker. He sleeps through the Hell Valley timeline and wakes up for the final timeline.Because Doc Brown never returns to reclaim him, Marty McFly and his wife Jennifer adopt him as their own, as Marty goes on to become an American Top Forty artist.