Growing up, Jason Reitman found solace in sketch comedy. For the Montreal native, 鈥淪aturday Night Live鈥� was more than just a show 鈥� it was a sanctuary for misfits like himself.

鈥淎s a comedy nerd, you always kind of feel like an outsider. You don鈥檛 feel like a cool kid. I just remember watching 鈥楽NL鈥� for the first time and thinking, 鈥楾hey do this every week?鈥欌�� There was going to be something to talk about at school every Monday morning,鈥� the Canadian-American writer-director recalled at the Toronto International Film Festival earlier this month.

鈥淚n the same way that 鈥楽NL鈥� is like an orphanage for wayward comedians, the show itself collects all the comedy nerds who feel like outsiders because it is not only making you laugh, but teaching you what can be funny on a weekly basis.鈥�

After releasing his breakout dramedy 鈥淛uno鈥� in 2007, Reitman told his agent that one of his dreams was to write for 鈥淪NL.鈥� He got his chance that year with a weeklong writing stint on the show.

鈥淭hose minutes and seconds leading to it going live are like the Stanley Cup and the Super Bowl all rolled into one. The adrenalin of it is insane,鈥� he said.

Reitman aimed to capture that turbocharged energy in 鈥淪aturday Night,鈥� a dramatization of the shambolic 90 minutes leading up to the sketch-comedy institution鈥檚 very first episode in 1975. The film opens in Toronto on Friday, followed by a wide release on Oct. 11 鈥� exactly 49 years to the day the show debuted on NBC.

Vancouver鈥檚 Gabriel LaBelle stars as an overwhelmed Lorne Michaels, the show鈥檚 Canadian architect who faces myriad hurdles while guiding a troupe of untrained and untested comedians and writers. The cast includes Dylan O鈥橞rien as Dan Aykroyd, Cory Michael Smith as Chevy Chase and Nicholas Braun as both Andy Kaufman and Jim Henson.

鈥淚 wanted the audience to feel not only what it was like for an episode to go live, but what is it like when culture changes in a moment?鈥� said Reitman.

Reitman said his famous father Ivan, who made several films with 鈥淪NL鈥� alums including John Belushi and Bill Murray, ran in the same circles as Canadian actors Aykroyd and Valri Bromfield, as well as musicians Howard Shore and Paul Shaffer, who were all involved in the early days of the show.

Despite whatever second-hand stories he might have absorbed growing up, Reitman said he went to painstaking lengths to ensure every detail in his film was accurate. He and writing partner Gil Kenan interviewed 鈥渆very living person we could find who was in the building that night.鈥�

Reitman said the many obstacles Michaels and his crew encounter in the film 鈥� from John Belushi refusing to sign his contract to Milton Berle exposing himself 鈥� are all based on true stories.

However, when Reitman interviewed Michaels himself, the Toronto native didn鈥檛 mention any personal anxiety about that debut show.

鈥淟orne doesn鈥檛 communicate stress. Lorne is a river of cool and he also doesn鈥檛 like to look in the rearview mirror,鈥� he said.

Reitman said the most intriguing insight he learned was that Michaels was initially slated to host 鈥淲eekend Update,鈥� the iconic segment known for its satirical take on current events and news.

鈥淚 think this was a moment when he had to realize, 鈥業鈥檓 not the performer, I鈥檓 the producer, I鈥檓 dad. I鈥檓 not supposed to be on camera. I鈥檓 the person who鈥檚 going to make it possible for all these great comedians to have a career,鈥欌�� said Reitman.

He believes part of Michaels鈥� success can be attributed to both his outsider鈥檚 lens as a Canadian and his ability to recognize 鈥渙verlooked talent.鈥�

鈥淗e was able to look at someone like John Belushi, who didn鈥檛 look like anybody on television, or Dan Aykroyd, who didn鈥檛 sound like anyone on television, and know that they were stars. And that鈥檚 continued through to Adam Sandler and Will Ferrell,鈥� said Reitman.

鈥淟orne has constantly been able to evolve and understand, 鈥榃hat is the next stage of comedy? Where are we going from an evolutionary standpoint?鈥� He鈥檚 done that for 50 years and I have to think that some of that has to do with his origin story of being from Toronto and having that Canadian perspective of the world.鈥�

As for Michaels鈥� view on 鈥淪aturday Night鈥�?

鈥淟orne鈥檚 a private guy, but I鈥檒l say that a couple weeks ago, I got a lovely congratulatory note from him,鈥� said Reitman.