"You turned her down?" asks Doctor Emmet Brown, standing inside his garage laboratory next to the DeLorean.

"I can't go to the dance with my mom!" exclaims Marty McFly. "It's sick!Anyway, isn't she supposed to go with Dad? How is taking my own mom to the dance gonna be of help."

"Marty, she's not your mom yet, and if you don't fix things, she never will be. At least she'll be at the dance. As long as you can make sure they show up and somehow interact."

"I..I just don't feel right about it."

"Take a look at your picture, Marty."

The teenager from the future takes out a small photograph of him, his brother Dave, and his sister Linda.

He can see that Dave is totally erased, and Linda's face is becoming blurry.

oooooooooo

Marty picks up the phone at about 6 PM, when he figures that his mother Lorraine would be having dinner. He turns the dialing wheel with his finger. He glances at Doc, sitting at the dining table.

He feels tense as the telephone rings.

"Hello," a female voice asks.

"Hi, this is Marty Mc..er, Klein," says the teen, using the alias he came up with when he first arrived here in 1955. "Is Lorraine there?"

"I'll get her," says the woman.

"Hi, Marty," says Lorraine.

"About that dance Saturday night, I...I'd really like to take you."

"That's so sweet. But I already have a date."

"You mean with George?" asks Marty, elated. Maybe things would work out after all.

"No, Biff."

It takes five seconds for those words to sink in. Suddenly a deep shock covers his very soul. "You,you can't go to the dance with Biff."

"He asked me, Marty," replies Lorraine. "He wasn't my first choice, but you did turn me down and I couldn't wait for you to change your mind."

"Can't you get out of it?"

"And show up with you instead? Marty, I'm not that kind of girl. You had your chance and it's now too late."

Marty hangs up the phone. "Shit, she's going to the dance with Biff!" he says to Doc. "Just what I need. To go back to the future and end up with Biff for my old man."

"You're going to have to sit down with this Biff character and reason with him," replies the scientist.

"He tried to run me over with his car! There's no way I can reason with him."

"If he takes your mother to that dance," says Doc, "it could throw the entire space-time continuum out of balance. You;re just going to have to explain that to him."

"Doc, it's gonna take a lot more than a science lecture to deal with Biff Tannen," says Marty.

oooooooooooooo

Biff Tannen suddenly wakes up to a loud screaming noise being pumped into his ears. He looks and sees this yellow creature standing before him. He yells out his deepest fears.

"Silence, Earthling," says the creature, his voice deep, as if it was what fear itself sounded like.

"Who...what are you?" asks the seventeen-year-old.

"My name is Darth Vader," says the creature. "I am an extraterrestrial from the Planet Vulcan."

"I...I must be dreamin'."

"This is no dream! You are having a close encounter of the third kind! You have reached the outer limits of the twilight zone!"

"I gotta get out of here!"

Biff throws off the covers, and is greeted by a blast of heat. He can see the source, some strange device.

"Halt, my heat ray will vaporize you if you do not obey me!"

"All right!" yells Biff, raising his hands. "Turn it off! Turn it off!"

"Silence!" yells the creature, holding his arm to his head. "I am receiving a transmission from the Battlestar Galactica!" Biff can hear some beeps. "You, Biff Tannen, have been selected by the Supreme Klingon to rendezvous with our mothership three Earth cycles from now - Saturday night in your language."

"Saturday night. But I've got a hot date Saturday night!" protests Biff.

"What do you mean by hot date?" the creature asks interrogatively.

"You know...I was gonna get laid."

Suddenly, the infernal loud assaults Biff's ears again, even drowning out his own screams. The noise sounds as if it were broadcast from the depths of Hell.

"Turn it off!" pleads Biff. "Please, turn it off!"

"Insolent Earthling," says the creature. "Do you wish me to melt your brain?"

"No, please! I'm sorry, I'll do anything, but please don't turn that noise on again!"

"You will cancel your so-called hot date. You will cancel it now!" The creature shoves the phone at Biff.

"But it's the middle of the night," protests the teenager. The noise assaults his ears again. "All right, stop! I'll do it!"

Biff picks up the phone and dials. "It's ringing," he says. "Hello, Mr. Baines. Uh, it's me, Biff Tannen. Could I talk to Lorraine, please?..."Uh, yes, sir, I know what time it is, but it's kind of urgent...Well, could you wake her up, sir?...Hello, Lorraine. This is Biff. I have to cancel our date...Yeah, I know what time it is, but it couldn't wait -- I had to tell you right now. I'm sorry."

Biff puts the phone down. Lorraine's voice could be heard even with the receiver on the desk.

"why couldn't this wait until tomorrow!" she screams over the phone. You're a jerk, Biff Tannen! And I never want to see you again!"

Biff could hear the phone being hung up, and then a dial tone.

"Well done, Earthling," says the creature. He hands Biff a piece of paper. "Write this down. On Saturday night at eight o'clock Earth time, you will await the arrival of the Millenium Falcon at the junction of Highway 50 and Statte Route 89."

"But that's eighty miles from here!" protests Biff.

"Be there or suffer the consequences!"

The creature disappears out of the bedroom window. Biff just stares out in amazement.

ooooooooooooo

Leaving Biff's house, Marty smiles under his hood. He chuckles at the thought of having pulled this sort of prank on anyone in 1955, let alone Biff Tannen. With the radiation suit and a few things brought from 1985.

I wonder how my dad would react, he thinks.

He leaps over a hedge in park across the street from Biuff's house.

And lands on top of a teenage couple necking on top of a blanket sitting on the grass.

The girl screams and attacks Marty. In the scuffle, the hood of the yellow radiation suit is pulled off.

"Stop it1" yells Marty. "I was just pulling a prank on someone. It's just a costume. It was just a joke, a practical joke!"

Marty runs off into the night.

"This neighborhood's going to Hell," says the red-haired boy with was necking with the girl.