Future Boy: Back to the Future and My Journey Through the Space-Time Continuum
By Michael J. Fox and Nelle Fortenberry
Flatiron Books
ISBN: 978-1250866783
176pp.

Forty years ago, Marty McFly drove a DeLorean at 88 miles per hour and entered cinematic history. But few people know just how impossible the job seemed for the young actor playing him.

In his new memoir, Future Boy: Back to the Future and My Journey Through the Space-Time Continuum, actor Michael J. Fox pulls back the curtain on the sleep-deprived, time-bending reality behind Hollywood’s most iconic time-traveller and why his real-life juggling act was almost as wild as Marty’s.

Before anything else, Fox makes one thing clear: this is not another retelling of his Hollywood résumé. He has already written four books that cover his career and the Back to the Future trilogy. This memoir zooms in on something far more specific — the intense three-month stretch in 1985 when he was filming Family Ties by day and Back to the Future by night, often surviving on just a few hours of sleep and pure adrenaline.

In today’s Hollywood, schedules would be rearranged, hiatuses granted, and wellness coaches summoned. But in 1985, Fox was a young Canadian actor who looked like a teenager and worked like an adult. NBC allowed him only one day off, and most nights he slept four hours — if at all. During that window, he lived a double life: Alex P. Keaton, from 10am to 6pm, and Marty McFly from 6:30pm until dawn.

Actor Michael J. Fox recounts how he managed playing Family Ties’ Alex P. Keaton by day and Back to the Future’s Marty McFly by night

“How did he survive that?” was the industry’s favourite question for decades. Now we finally get the answer.

“I was special and unique in America: old enough to work the long hours of an adult, but with a look that allowed me to play a much younger character,” Fox writes with co-author Nelle Fortenberry. And indeed, the memoir details how a 23-year-old — small, scrappy, and not yet a movie star — managed to work 20-hour days, six days a week, without losing his edge on either screen.

Fox also settles one of Hollywood’s most famous behind-the-scenes stories. Why was he suddenly in such demand? Because the filmmakers had already tried someone else. Eric Stoltz was originally cast as Marty McFly, but his serious, brooding interpretation of the role didn’t match the film’s tone. Midway through shooting, director Robert Zemeckis and writer/producer Bob Gale made the near-unthinkable decision to replace him — and return to their first choice, the still-overbooked sitcom star.

The cast had mixed reactions when Fox arrived. Lea Thompson warmed up to him immediately during their first scene. Christopher Lloyd, ever the professor, reportedly asked, “Who’s Eric?” when told Stoltz had been let go — he’d only ever referred to him as “Marty”.

Fox recounts these moments with the wit and comic timing that made him beloved long before Parkinson’s disease reshaped his life. The memoir is filled with interviews from the cast and crew of both Family Ties and Back to the Future, offering an in-depth look at a moment that changed Hollywood history.

In today’s Hollywood, schedules would be rearranged, hiatuses granted, and wellness coaches summoned. But in 1985, Fox was a young Canadian actor who looked like a teenager and worked like an adult. NBC allowed him only one day off, and most nights he slept four hours — if at all.

The book also paints a vivid picture of the learning curve Fox faced transitioning from a multi-camera sitcom to a Spielberg-produced feature film. His sitcom instincts — precision timing, quick resets and nimble physicality — proved invaluable and, according to the director, gave them hope for the first time since production commenced.

Not only does Fox reflect on working with Christopher Lloyd, Lea Thompson, Crispin Glover and Thomas F. Wilson, he even pays tribute to the people who didn’t make it into the final film: Eric Stoltz and Melora Hardin — the original Jennifer, recast because her taller height clashed with Fox’s.

And yes, Fox confirms one of the strangest bits of Back to the Future lore: the DeLorean was chosen because it looked cool. No one liked driving it. The alternative? A time-travelling refrigerator — abandoned partly because the makers feared kids would climb into their own. The cast accepted the finicky stainless-steel beast because, frankly, it was still better than a fridge.

The memoir also features full-colour photographs that will send readers straight back to the film — and maybe to Family Ties too. Fox recounts how his stunt double was discovered (or how the stunt double discovered him), how much he appreciated Alan Silvestri’s score for the film, and how his real-life experiences with skateboards, electric guitars and bullies added authenticity to Marty, making Back to the Future a film for all ages.

If Fox’s gruelling schedule sounds superhuman, add the emotional pressure: replacing a lead actor, mastering a new crew, and doubting himself every night. It mirrors Marty’s own story — thrown into chaos, forced to adapt, and somehow improvising his way to victory. Fox’s nightly commute from Paramount to Universal became its own space-time continuum. Great Scott, indeed!

The memoir avoids the later sequels and doesn’t dig into the controversy surrounding Crispin Glover’s absence from Part II. However, Fox hints that tension between Glover and Zemeckis began much earlier. He doesn’t take sides, since he had worked with Crispin during a memorable Family Ties episode and owed his Hollywood career to the director, with whom he later worked on two Back to the Future sequels.

“This book is for all the people who love Back to the Future as much as I do,” Fox writes. And he’s right. Because when it comes to this franchise, you’re either a fan — or someone who hasn’t seen it yet.

Future Boy makes you want to watch the trilogy again. To see not just the time-travelling teenager on screen, but the exhausted, determined young actor who worked himself into a legend — tired, sleepless and relentless — powered by the kind of energy that can only be described as… time-travel magic.

The reviewer is a broadcast journalist who also writes on sports, film, television and popular culture.

X: @omair78

Published in Dawn, Books & Authors, February 1st, 2026