Dr. Emmett Brown

"Great Scott!"

"This is heavy."

"There's that word again, 'heavy.' Is there something wrong with the Earth's gravitational pull?"

"If my calculations are correct, when this baby hits 88 miles per hour, you're gonna see some serious shit."

"The way I see it, if you're gonna build a time machine into a car, why not do it with some style?"

"I'm your density. I mean, your destiny."

"This is it, this is the answer. It's what we've both been waiting for."

"You see, according to my calculations, you fell asleep exactly 120 minutes before you were supposed to."

"I'm afraid you've been asleep for nearly nine hours."

"The lightning strike is the key. It will generate 1.21 gigawatts of electricity."

"We don't need roads where we're going."

"This is a matter of life and death."

"You must be referring to some friend of yours in the future."

"The space-time continuum is not something to fool with."

"I've always said that if you could somehow harness lightning, you could achieve time travel."

"Well, the way I see it, every life has a defining moment."

"Do you have any idea what you've done? You've created a new future!"

"The past can hurt, but you can run from it or learn from it."

"Science rules!"

"I'm sorry, but you're my density. No, wait, your density."

"What happens if Marty sees us together? It could create a paradox."

"This is the part where you tell me something useful."

"We must use extreme care."

"I believe in you, Marty."

"The future hasn't been written yet. No one's has."

"Whatever happens, happens."

"This temporal displacement of citizens from one era to another could cause serious problems."

"I'm going to need the help of a time machine."

"Remember, the only way to save the future is to appreciate the past."

"Marty, you've got to come back with me. It's your kids!"