Back to the Future S01 E06 Go Fly a Kite

"The time travelling adventures of Doc Brown, his family, and his friend, Marty McFly."

After Jules insults his intelligence and comments that he can't really be a part of the family, Verne starts to think his real father is Benjamin Franklin. Unfortunately, this leads to Verne ruining Franklin's famous electricity experiment and it's up to Doc to set things straight.