16 details you may have missed in 'Black Widow'

The film makes you do a bit of math, but Scarlett Johansson previously confirmed the standalone film takes place in between "Civil War" and "Avengers: Infinity War" while her character, Natasha Romanoff, is on the run from the government.

(Reminder: She just helped Cap evade Iron Man and General Ross for refusing to agree to the terms of the Sokovia Accords.)

"The film takes place on the heels of 'Captain America: Civil War,'" "Black Widow" co-producer Brian Chapek says in the film's production notes. "Natasha has broken the Sokovia Accords, betrayed Secretary Ross, and the Avengers find themselves disbanded. In the beginning of the movie, we establish Natasha desperate to evade Ross and leave U.S. soil. When she gets an opportunity to start over again, she quickly realizes that there are darker forces out there in the world that compel her to return to the action."

"Black Widow" begins with a flashback to 1995 in Ohio to show Nat and Yelena's childhood.

Fans may have noticed that's the same year in which the majority of 2019's "Captain Marvel" took place with a grown-up Carol Danvers (Brie Larson).

If you listen to the film with Disney's audio description on, young Natasha is said to be about 10 in the film's 1995 flashback.

That would put Nat at 31 when the film flashes forward 21 years to pick up after the events of "Captain America: Civil War."

Melina tells Alexei, "I don't want to go."

Any Marvel fan will immediately stop and remember those are the same words Peter Parker said to Tony Stark before he disappeared in the "Avengers: Infinity War" snap.

That's a throwback to 2016's "Civil War."

Nat had the option to stop Cap and Bucky in their tracks before they got away. Instead, she decided to aid the two and deploy her electroshock weapon to stun T'Challa/Black Panther multiple times.

Nat immediately said she was going to regret her choice.

In "Civil War," Tony warned Nat that T'Challa "told Ross" what she did and that he'd be coming for her. Tony wasn't wrong. It led Ross and his team to pursue her, which is what they're doing at the start of "Black Widow."

Ross is referencing how they captured Wilson (The Falcon), Barton (Hawkeye), Scott Lang (Ant-Man), Wanda Maximoff (Scarlet Witch) and imprisoned them for a short time, in what's called the Raft, in "Captain America: Civil War."

What Nat doesn't realize is that Ross may be bluffing. At the least, he may be unaware that Cap has probably broken the trio out already. By the end of "Civil War," we see Cap is at the jail ready to bust them out.

After Nat's appearance in 2016's "Captain America: Civil War," she showed up in 2018's "Avengers: Infinity War" with short blonde hair.

It was a bit puzzling since we never saw Nat change hairstyles in between the two films. The small moment with Nat holding the hair dye kit helps fill in that gap.

In "The Avengers," Loki asks Natasha if she can wipe out all of the "red" in her ledger.

He asks, "Can you wipe out that much red? Dreykov's daughter, Sao Paulo, the hospital fire?"

General Dreykov was the officer who oversaw the "Red Room" program where Natasha and other young women were trained to become assassins. We now know Loki was referencing the Budapest Operation when mentioning Dreykov's daughter.

In "Black Widow," we learn that Nat was responsible for the death of Dreykov's daughter, or so she thought. In reality, an explosion set in motion by Nat and Clint/Hawkeye left the young girl disfigured. Dreykov then turned his daughter into the ultimate weapon, Taskmaster, a masked warrior who can analyze, assess, and mimic anyone's abilities.

Yelena says, "I doubt the God from space has to take an ibuprofen after a fight," likely referencing Thor.

While Alexei is getting a Red Guardian tattoo, the camera focuses on another tattoo on his right shoulder of two roses with names underneath. Fans pointed out that the names are nods to Natasha and Yelena, his two "adopted" daughters who he cared for while undercover in the United States.

Even though he handed the girls over to Dreykov and the Red Room at the film's start, Alexei did really care for them.

In "Black Widow," Alexei is a former superhero called the Red Guardian (essentially Russia's answer to Captain America).

The Crimson Dynamo is the name of another Marvel character who was often at odds with Iron Man. In the comics, one version of the Red Guardian, Anton, said he was a former Crimson Dynamo pilot.

Yelena tells Nat that she's "a total poser," mimicking some of the over-the-top, sexy poses and hair flips her character did early on in "Iron Man 2" and "The Avengers."

"It does look like you think everyone's looking at you, like, all the time," Yelena says.

During a set visit for the film, Johansson told a group of reporters that, early on in her introduction to the MCU, the character was "so sexualized" and treated "like a possession" and "piece of a--," according to HelloBeautiful.

If you go back and re-watch 2010's "Iron Man 2," Tony Stark (Robert Downey Jr.) tells his then-assistant Pepper Potts "I want one" after seeing the way Nat handles herself and easily takes down Happy Hogan in the ring.

Nat gets a bit misty-eyed, but dosesn't respond.

She once discussed this with Bruce Banner/The Hulk in "Avengers: Age of Ultron" when the two explored a potential romance. At the time, she told him she couldn't have children, if that was something he was concerned about because of the Hulk DNA. She made it seem as if it didn't bother her, but her face said otherwise.

Yelena references the sterilization process in more graphic detail after she and Nat break Alexei out of prison.

As we previously suspected, Natasha wears Yelena's handy vest in "Avengers: Infinity War."

In "Black Widow," Yelena tells Nat the vest is the first piece of clothing she bought for herself and that she made modifications to it.

"You can put so much stuff in there. You wouldn't even know," Yelena says.

Nat "pulls off her face" at one point to reveal she was Melina all along in a moment where the third act of "Black Widow" starts to get a bit silly.

We've seen this bit used a few times over now, including when Nat pretended to be another woman in "The Winter Soldier," so it's getting to be a bit old.

In the film's end-credits scene, Yelena is seen with a dog who she calls Fanny.

While the name may not register at first, you may recall it's the fake American moniker Nat gets when she's given an alternate identity by Mason (O-T Fagbenle) earlier in the film.