Following the conclusion of Back to the Future Part III, in 1991, Dr. Emmett Brown moved into a farm in Hill Valley with his wife Clara, their sons Jules and Verne, and the family dog, Einstein.

In addition, relatives of the McFly, Brown, and Tannen families were plentiful in the past or future parallel time zones visited.

Unlike the films, which took place entirely in Hill Valley and the surrounding area, the series frequently took the characters to exotic locations.

The first season also included post-credits segments with Biff Tannen telling a joke related to the episode, alluding to Thomas F. Wilson's career as a stand-up comedian.

James Tolkan, who previously portrayed Principal Strickland from the films, voiced an unnamed Civil Defense Warden in the episode "Marty Mcfly PFC".

Both parties walk away from the battle without fighting, and they all chase after Doc, Marty, and the boys, forcing the group to escape by returning to their own time.

Doc realizes that he must return to the past to restore the meteor and in doing so, sentencing their friend, Donny the Pteranodon, into extinction with the rest of the dinosaurs.

Ancestors: Mercy Tannen and her father (Biff) With Marty as company, Doc heads to Ancient Rome to return overdue library books.

When all of the electricity goes out in present day Hill Valley, Doc, Marty, and Einstein trace Verne back to Benjamin Franklin.

Ancestors: Biffando De La Tanen (Biff) While Doc is in the hardware store, Einstein is asleep in the back of the DeLorean when it is stolen by a couple of bank robbers.

Using one of Doc's inventions, a pair of glasses that helps the batter to hit like a major leaguer, Marty "steps" in for Pee Wee and wins a critical game.

Instead of being thankful, Pee Wee is terrified – he is being pressured to "throw" the games by Diamond Jim Tannen, a big time gangster.

As Doc and Clara attempt to repair the solar sails, Jules and Verne head to the future to help save their parents.

When Clara, Doc and Marty go inside a toy store, a pickpocket steals the watch from Jules and the boys pursue the thief.

Ancestors: Ebiffnezer Tannen (Biff) It is the "Father-Son Big Mouth Bass-Off" and the boys learn that their father is afraid of fishing.

Tannen (Biff) On April Fool's Day, Jules and Verne "sabotage" many of Doc's inventions, including his Brain Wave Analyzer.

After many attempts at seeking other employment (parking cars, mowing lawns, making pizzas), he goes back in time to the Cro-Magnon period.

Once they arrive, Martha falls instantly in love with Marty and causes Clara to disappear in the future (mirroring the events of the first film).

Doc, who has used the locomotive to travel back in time, arrives with Daniel to find that Wild Bill has run away and Verne and Martha are in the process of being attacked by a Grizzly Bear.

Doc surveys the area, recognizes the terrain and instructs them to throw a buffalo hide over a hole and mere moments later, a column of water (Old Faithful) elevates them up and out of danger.

The story escalates when the real Mac the Black confronts Marty and Verne while the Spanish Armada engages the pirates in battle.

With the intention of helping his girlfriend Jennifer, Marty heads back, with Jules and Verne, to the Old West to find the truth to the matter.

Ancestors: Wendell and Genevieve Parker (Jennifer)/Thaddeus and Hepzibah Tannen (Biff) Verne hates taking dance lessons and asks Doc and Clara for his help.

People are unable to turn off lights, lawnmowers, hairdryers, etc... Biff decides to run Doc and his family "outta town".

The first Founder's Day was celebrated with horse shoe tossin', quiltin' bees, barn dances and chasin' greased pigs.

As the comet Kahooey is about to pass the Earth's orbit, Biff declares that aliens are coming and causes the residents of Hill Valley to panic.

Marty and the boys find that Doc has built a flying craft to view the comet and that Biff has mistaken it for an alien space ship.

When Marty, Jules, and Verne appear in beekeeper suits and the DeLorean while confronting him, they make Biff promise that he will not say anything about the "visit" from the aliens – now and in the future.

Marty breaks his date with Liz (who has already found someone else, richest boy Milton Van Conrad the Third, to take her out) and apologizes to Jennifer for making fun of her hairdo.

In addition, the first episode from each season of the animated series (Brothers and Mac the Black) are included as bonus materials in the Back to the Future: 30th Anniversary Trilogy set.