Episode 5 Spoilers
at the end of episode 5 there was a cliff hanger where each Marty from different timeline's come's through to tell Doc and the 1986 version of marty something about the space time continium. It was very funny how they done it as well, they said the exact same lines from the end of back to the future part 1 movie.. but the only differents is Doc says "What? do we become assholes or something?" instead of Marty. then 1986 Marty and Doc get in the car and go through time again, then it ends.... it was a great ending but it felt like it was left open for a sequal series.