Doc Brown

"This is heavy."

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

"Great Scott!"

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

"Roads? Where we're going, we don't need roads."

"The future is whatever you make it, so make it a good one."

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

"You've gotta make a choice: are you gonna be the science guy, or are you gonna be with the girl?"

"A temporal paradox could unravel the very fabric of the space-time continuum and destroy the universe!"

"Get your head out of the clouds and focus on what matters."

"Science and progress do not stand still."

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

"Thirty years and I'm still not used to the delocalization effect."

"By the way, you're my best friend, and I care deeply about your well-being."

"This is it, this is the point of maximum jeopardy."

"You're my best friend, Marty. I couldn't let you down."

"The consequences of his actions could be disastrous."

"I don't like violence, but I will defend what's right."

"Time travel is theoretically possible, but practically impossible."

"The space-time continuum is the very fabric of our existence."

"Marty, you're my best friend and I couldn't bear to lose you."

"Anything is possible if you put your mind to it."

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

"1.21 gigawatts of electricity is required to achieve temporal displacement."

"I must know about the future from someone who's lived it."

"This is the gateway to the future!"

"Tell me about your family, Marty. How are they?"

"Without change, there is no growth."

"You've got to believe in yourself, even when nobody else does."

"Science demands we verify our hypotheses with evidence."