11 things you probably didn't know about season 2 of Netflix's 'The Umbrella Academy'

Blackman revealed the fun fact during a Reddit AMA. Twitter user @Alejandracmv posted a thread of every time a sparrow popped up on the second season.

The number is a nod to the 43 children born at the same exact time on October 1, 1989, to mothers who had no prior indication of being pregnant before giving birth to children with superpowers (like the seven kids adopted by Reginald Hargreeves).

The sparrow symbol is also relevant to the season two finale cliffhanger, in which the Hargreeves traveled back to the future and realized that something went terribly wrong.

Instead of the mansion being called the Umbrella Academy, Reggie (their father who died in the original timeline), informed them that the building was the home of the Sparrow Academy.

While on the way to meet with the father for a "light supper," Luther was so nervous that he farted in the elevator with his siblings. While the other actors stayed in character and feigned being repulsed by the smell, Castañeda couldn't maintain his laughter.

"I don't think we got a clean take with David Castañeda," Hopper said during a video for Netflix.

Similarly, Blackman described the moment as a "quintessential scene" from season two during an interview for Entertainment Weekly.

Season two took months to film in different parts of Canada, including Hamilton, Ontario, and Toronto. In interviews, the cast members said that when they started production on the second season, the weather was extremely warm but cooled down (hence the snow) near the end of filming.

In an interview for MTV News, Gallagher said that shooting the finale was challenging because the weather changed.

"We were in a Canadian summer, which was very hot and humid and we're supposed to be in Dallas, and all of a sudden, winter hits and the entire set is covered in snow," Gallagher explained.

Because there was no way to work around the snow, the show writers incorporated the cold front into the uncontrollable powers Harlan got after Vanya saved his life on episode four.

Speaking to Mashable, Raver-Lampman also said that they finished shooting in November and a snowstorm hit when they had to film the big finale battle.

The snow made it difficult to maintain consistency while filming, since the actors often filmed the same scene multiple times, leading to footprints in the snow. So, in addition to the VFX team working to digitally add snow to hide any continuity errors, the actors also ran on sheets of Styrofoam and white fabric.

"Doing a choreographed dance just didn't feel right for the moment that they were in," Raver-Lampman said, explaining that they instead were instructed to have fun and improvise for the scene (which was set to Sam Cooke's "Twistin' the Night Away").

During the episode, Vanya ran through cornfields as she was chased by the three Swedish assassins.

In a behind-the-scenes podcast, it was revealed that a local Canadian farmer named Chris Burkholder planted the cornfield.

The "Umbrella Academy" crew asked Burkholder to grow an acre cornfield (about 34 stalks), which ended up growing past 12 feet by the time they had to film a month later.

Music is a huge part of what makes "The Umbrella Academy" an enjoyable show to watch.

During season two, they incorporated songs like Maxine Nightingale's "Right Back Where We Started From" and Backstreet Boys' "Everybody (Backstreet's Back)" in unlikely situations.

There was also a cover of Billie Eilish's "Bad Guy."

In his Reddit AMA, Blackman said that "sometimes we want a song and can't clear it," which was the case for the "Jolene" cover.

"It was really complicated with the number of licenses involved," he said.

"My shoes were so incredibly slippy," the actor said in a video for Netflix. "It was unbelievable. I started sprinting and my foot went behind and I heard my hamstring twang."

The actor actually grew out his real hair for season two, but because some seasons required his season one look, his hair had to be cut.

The heat made it a little bit uncomfortable at first, but eventually you just kind of get used to it," Castañeda said of wearing a wig during an Entertainment Weekly interview.

"The only real things in the entire sequence are the actors, some debris and a tank," Blackman said in his Reddit AMA.

He added: "The actors and the crew were in a huge green volume (basically a boxed set of green sheets hanging from rails) outside. Sylvain, our director, told the actors what the viewers would be seeing when it was completed and they acted accordingly. It was in the hottest part of the summer and we worked for 5 days and nights."

Speaking to Entertainment Weekly, Min said that his costar would imitate him "every chance he got."

"We would be having a conversation and then suddenly he'd just start repeating my words and my mannerisms," Min said, adding that he also recorded videos for Sheehan so he could better familiarize himself with Min's movements.

During the episode, Jack Ruby interrupted Luther while eating so he could give him the address for Allison's Dallas home.

Blackman explained that because they filmed many takes and needed to maintain continuity, "we need to provide [Hopper] with a fresh steak for each take."

"Tom gobbled down 23 steaks that day and took the rest home for a next-day snack," he said in his Reddit AMA.