AT sunrise, Marty picked up a gasoline can and biked his way to the nearest gas station. There, he bought a gallon of gas and went back to the DeLorean to fill the tank. When nightfall arrived again, Marty lifted the DeLorean off the ground and flew it to the Brown Mansion. Spying through the windows, Marty spotted young Emmett. Maneuvering the car so that the driver's side of the car would be next to the window. The window was on the second story. Marty reached out and knocked. Emmett was doing homework. When he heard the knocking, he looked up and saw Marty in the driver's seat and was startled. He opened the window and asked "How did you get up here..." He was stopped in midsentence and looked at the DeLorean. It was hovering about 20 feet off the ground. Shocked, Emmett asked Marty "How did you do that." "You did that." said Marty, "You had a hover conversion on the car in the early 21st century." Emmett staggered back and said "Great Scott." After that, he passed out. Marty set the car down on the driveway and went back up to the window via a vine and entered. He tried to wake him but to no avail. Then a door was heard opening and closing. Marty went to the bedroom door and peered out. It was Emmet's father. "Emmett." he said, "I'm home." Holy geez. said Marty. Quickly he picked up Emmett, pulled off his shoes and tucked him into bed. Then, closing the window, he turned off the lights and hid into a closet. Mr. Brown came in and looked around. Then, he closed the door. Marty heaved sigh of relief.
Marty awoke to a noise outside the closet. It was Emmett being awaken by his father. Marty peered outside the closet door. Emmett got out of bed and peered down to discover that he was still wearing his clothes from last night. He went to where his homework was and discovered that it wasn't done. Then he had a confused look to his face as if he didn't remember getting into bed last night. He went out the bedroom. Marty siezed this opportunity to get out of the closet and follow Emmett. Once there, he overheard Emmett talk to his father, but his father said "Emmett, your Latin. Comora tua latia esus." "Presta caprius." said Emmett. "Opti pro bono." said Mr. Brown, "Remember your Latin, Emmett." "I will, sir." said Emmett, "Listen, it seems that I didn't finish my homework." Shocked at this, Mr. Brown said "It seems that you also slept in your clothes last night." "I'm responsible for all of that." said Marty. Both father and son turned to see Marty standing there. Emmett was shocked. "How did you get in here?" he asked. "Through the window." said Marty. "Wait a minute." said Emmett's father, "I know you from the factory." "Yes." said Marty. "You made off with Mr. Hughes' Spruce Goose the other day." said Mr. Brown. "That's right." said Marty, "I was fleeing from Billsif Tannon after I told him that I knew he was a Nazi collaborator." "He is?" asked Mr. Brown. "You don't believe me, do you." said Marty. Then, he turned to Emmett and said "Listen. I filled the DeLorean up with gas yesterday and flew it over here to get that poison. But when you saw that the car could fly you passed out. That's why you didn't finish your homework. I had to tuck you into bed when your old man arrived. And that's why you slept in your clothes." "A likely story." said Emmett. "Car?" asked Mr. Brown, "What car?" "It's a..." said Marty, "Oh shit!" Mr. Brown was shocked. "How dare you use such language in this house." he said. "With good reason." said Marty, "I left the car out there all night and now it's morning. If someone see's it..." "What's the matter with that?" asked Mr. Brown. "It's a long story." said Marty, "And you're not going to believe it if I told you." "You told me." said Emmett. "That's because you invented it." said Marty, "Or you're going to invent it." "Invent what?" asked Mr. Brown, "And what do you mean 'going to invent it'?" Emmett stepped in and said "This guy says he's from the future." Again, Mr. Brown was shocked. Emmett went onto say "He says that he came in a time machine that I invented-or going to invent. And he wants me to help him get back to the year...what is it again?" "1985." said Marty. "1985." repeated Emmett. "I've got the proof out there." said Marty, "But I've got to get something from your son so I could us it to load the fusion generator that powers the flux capacitor so I could get back home." "And what is that?" asked Mr. Brown. "I can't tell you." said Marty. "And why not?" asked Mr. Brown. Marty turned to Emmett and noticed a fear of anxiety on his face and turned back to Mr. Brown and said "You're not going to like it." "I already don't like it." said Mr. Brown, "The other day you went into the factory, asked for my son, made off with the Spruce Goose, break into my house, upset my son, use profanity, and now you said my son got something that you don't want me to know?" He pointed the door to Marty saying "I want you to go now." "Alright." said Marty, "It's a jar of poison." "What?" asked Mr. Brown. He turned to Emmett and asked "Is this true?" Emmett didn't say a word. "Is it?" asked Mr. Brown again. Finally, Emmett answered. "Yes." he said. "Where did you get it?" asked Mr. Brown. Emmett hesitated. Then, he said "From Mr. Hughes' office." "What?" exclaimed Mr. Brown. "I made off with a boxfull Sunday during the broadcast of the 'War of the Worlds'." Emmett went onto say, "The man guarding Mr. Hughes' office got scared and started guarding the Spruce Goose. That's when I saw my opportunity to make off with it." "What for?" demanded Mr. Brown. "I wanted to experiment." said Emmett. "Well you could forget those experiments." said Mr. Brown, "You are going to give me those jars of poison so I could return them to Mr. Hughes and you're going to tell him what you did." At that, Marty sprang up. "You can't." he said. Mr. Brown turned to Marty and asked "Why not?" "Because if you returned those jars of poison, it'll cause a paradox." said Marty. "What do you mean 'paradox'?" asked Mr. Brown. "You see," said Marty, "Doc, I mean Emmett, needs to use that poison in the future." Mr. Brown gave Marty a cold stare. "You see," said Marty, "Doc, I mean Emmett, uses poison to power the fusion generator because it was a lot cleaner, less messier, and according to you Emmett, 'it's one helluva way to get rid of all of the DDT that was banned during the 1970's.'" "What did you say?" asked Mr. Brown. "I said", said Marty, "Emmett..." "I know what you on why Emmett would want to use poison." said Mr. Brown, "But I swore that somewhere in that sentence, you used a blasphemy." "Sorry about that." said Marty, "But if you return all those jars of poison to Mr. Hughes, Emmett wouldn't have them to load the flux capacitor, I don't get called over to get rid of those jars of poison, I wouldn't have that lone remaining jar of poison to load the fusion generator, and I wouldn't have come back here and be forced ask young Emmett's help because you returned the jar of poison because I came back here in time, in a poison powered time machine, and spilled the beans on young Emmett by telling you about him stealing jars of poison from Mr. Hughes office." Then, he said "That's what I mean by paradox." Both Mr. Brown and his son Emmett stood there, but couldn't make sense on what Marty said. "Okay." said Marty, "Just don't return it to Mr. Hughes. He'll never find out. That's how history will paint it. It must be." "Will you show us my son's 'invention'?" asked Mr. Brown. "I thought you never asked." said Marty. He led the two outside to the DeLorean. He opened the door. Then he opened Mr. Fusion. "It requires only to drops of poison." he said, "But I used the entire bottle because Emmett, as Doc, wanted to get rid of all of the poisons and reconfigure the fusion generator?" "I did?" asked Emmett. "It's a long story." said Marty. "Anyway, the poison fuels the fusion generator that powers the flux capacitor and activates the time circuits." "And what is this 'flux capacitor'?" asked Mr. Brown. Marty motioned them to the inside of the car and flicked a switch. Then he pointed to the back of the interior of the car where the flux capacitor was. Mr. Brown was taken aback by this. "That's my design." he exclaimed. Marty was startled by this. "What do you mean your design." asked Marty, "It's your son's design." "No." said Mr. Brown. "It's my design." "How can that be?" asked Marty, "Emmett told me the story himself." "Told you what?" asked Mr. Brown. "How one day he hung a clock over the toilet." said Marty, "The porcelain was wet, he slipped, bumped his head and when he came too, he came up with this idea about the flux capacitor which is what makes time travel possible." Mr. Brown motioned the two boys back into the house. "Come back in." said he said. He led the two to the bathroom that Marty recognized as the bathroom in which Doc had hung the clock. The door was closed. "Is this the bathroom that my son tried to hang the clock in?" asked Mr. Brown. Marty nodded affirmatively. Mr. Brown opened the door and showed that the floor was littered with empty toilet rolls. Each empty roll had somethings or some writings drawn on them. Marty walked in and said "It can't be." He turned to Emmett then he turned to Mr. Brown and said "The flux capacitor is Emmet's idea." He looked down to where Doc was to land on the floor in 1955. "He landed right...right..." Marty stopped in midsentence and noticed one of the empty toilet rolls lodged underneath the sink. There was something very familiar about that drawing. Marty knelt down and unlodged it. Studying it, he showed it to Mr. Brown and Emmett. "I was wondering where that particular roll went." Marty looked at the roll again. It was no doubt about it. It was the exact design of the flux capacitor.