"Once the film came out and was this huge success, the studio very quickly said, "We must have a sequel!" But because the second one was such a long script, and they couldn't find any way to shorten it, they decided to make it as two films. I'm surprised the second one wasn't marketed as "part two of three". A lot of people found it less rewarding because it didn't have the fun and lightness of the first one, but then the third one makes sense of the second – it all connects up. I think the first film resonates so well with audiences because of the element of wish-fulfilment at its heart. We've all said to ourselves, "I wish I could go back in time and change something" or, "If only I could do that over again"."

"[holding baby William] So you're my great-grandfather. The first McFly born in America. And you peed on me."

"They saved the best trip for last... but this time... they had gone too far."

"See you in the summer! You mean Summer 1990."

"Meet Marty. He's the kid who gets back... 100 years earlier."

"When the heck are they? In the summer!"

"Doc is dead... again. But this time... they broke the time barrier and destroyed the time machine."

"The rip-roarin' conclusion to the greatest adventure of all time."

"It's the last round-up... the final showdown... the rootin' tootin' conclusion to the greatest adventure of all time."

"Michael J. Fox — Marty McFly/Seamus McFly"

"Christopher Lloyd — Dr. Emmett Brown"

"Thomas F. Wilson — Buford 'Mad Dog' Tannen/Biff Tannen"

"Mary Steenburgen — Clara Clayton"

"Lea Thompson — Maggie McFly/Lorraine McFly"

"Elisabeth Shue — Jennifer Parker"

"James Tolkan — Chief Marshal James Strickland"

"Dub Taylor — Saloon Old-Timer #1 (Levi)"

"Harry Carey Jr. — Saloon Old-Timer #2 (Zeke)"

"Pat Buttram — Saloon Old-Timer #3 (Jeb)"

"[about to throw out the almanac] The Skyway's jammed. It's gonna take us forever to get there. And this stays here. I didn't invent the time machine to win at gambling; I invented the time machine to travel through time."

"My only regret is that I'll never get a chance to visit my favorite historical era, the Old West. But time-traveling is just too dangerous. Better that I devote myself to study the other great mystery of the universe: Women."

"[about Biff having gone back to November 12, 1955] Unbelievable that Old Biff could've chosen that particular date. It could mean that that point in time inherently contains some sort of cosmic significance. Almost as if it were the temporal junction point of the entire space-time continuum. On the other hand, it would just be an amazing coincidence."

"Getting back was only the beginning."

"Synchronize your watches. The future's coming back…"

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

"Next Saturday night, we're sending you back to the future!"

"I'm sure that in 1985, plutonium is available in every corner drugstore, but in 1955, it's a little hard to come by."

"Great Scott!"

"Since you're new here, I-I'm gonna cut you a break, today. So, why don't you make like a tree and get outta here?"

"Meet Marty McFly. He's broken the time barrier. Busted his parents' first date. And, maybe, botched his chances of ever being born."

"17-year-old Marty McFly got home early last night. 30 years early."

"Marty McFly just broke the time barrier. He's only got one week to get it fixed."

"Marty McFly's having the time of his life. The only question is—what time is it?"

"He was never in time for his classes... He wasn't in time for his dinner... Then one day... he wasn't in his time at all."

"Bumping into your parents is no big deal unless you bump into them before you were born."

"He's the only kid ever to get into trouble before he was born."

"Hello? Anybody home? Think McFly, Think!"