Episode Title:Witchcraft.Episode Description:Marty catches Jennifer talking with the school jock named Kelp and assumes she is dating behind his back. Jennifer, who has been tutoring the jock, tries to explain the situation but Marty does not listen to her. While the Browns are in Egypt a spear damages the flux capacitor and they are flung into another time. Marty goes to the Browns' house and receives a message that Doc and his family are in Salem, Massachusetts during the Salem Witch Trials. Taking the DeLorean, Marty brings a spare flux capacitor for the train to Doc, but the DeLorean that Marty and Einstein are in is in the water and comes out. As Doc fixes the train, Marty, Clara and the boys go to a town function. Marty spurns the advances of a young lady named Mercy (who is a Tannen) and she accuses him of being a witch out of spite. Marty is condemned for being a witch without being able to defend himself. Marty is sentenced to the "water" test and Doc saves him with a makeshift scuba suit. When Marty returns home, he apologizes to Jennifer for making accusations without first hearing her side of the story. Bill Nye Segment: Examining water pressure.