So the Agent Carter series has come to a close, and it was truly enjoyable to watch. Carter has proven herself as a strong character in the MCU universe, and we learned a bit more about Carter and Howard Stark before the days of S.H.I.E.L.D. Not to mention we got a look at the character of Jarvis, who was personally the highlight of the series for me.
While we got a good look at some characters from Captain America: The First Avenger, some more back story was revealed on yet another MCU character: Natasha Romanoff.
Remember Ep. 5, "The Iron Ceiling"? Peggy and the Howling Commandos travel to Russia where they find a boarding school with a young girl in it. The young girl goes on a rampage, stabbing Dum-Dum Dugan and escaping before the rest of the Howling Commandos can catch up with her.
The boarding school was used to teach young girls to be lethal assassins, which should already sound familiar if you've read one of my recent articles: Scarlett Johansson's Black Widow EXPLAINED!
In Black Widow's comic back-story,she was raised from a young age as a part of the Black Widow Ops Program, where she learned to be an assassin. The back-story seems to be more-or-less the same in the Marvel Cinematic Universe, taking into account the conversation that Black Widow has with Bruce Banner in the beginning of [The Avengers](movie:9040).
After following a young girl to a shack where Natasha is waiting, the young girl runs off. Bruce, guessing that the young girl was a spy, clarifies with Natasha, asking if girls start out at that young of an age. She replies, "I did." and then they change topics.
This goes to show that Black Widow in fact started out at as young of an age as the girl in the Agent Carter episode. That may seem unreasonable to most, as the episode is set in 1946, and The Avengers is set in 2012. If Natasha was raised at that facility in that approximate time period, she would be around seventy years old. Now tell me, does Natasha Romanoff look seventy to you?
As I also explained in the other article, Romanoff was psycho-technologically to have a longer life-span. This explains her more youthful figure, as she isn't quite as normal as other girls. Think of Mystique from X-Men. She has the same case of aging slower and having a longer life-span, so just think of the same applying to Romanoff (without her being a mutant of course).
The psycho-technological enhancement also explains what she said to Barton before the end-battle in The Avengers. Barton asks her if she knows what it feels like to be unmade, and she responds "You know I do". This could easily be her referencing the experiments done to her to enhance her abilities as an assassin.
Also, in the Agent Carter series, the character Dottie Underwood is revealed to be one of the girls raised in that Russian boarding school. Once we take into consideration that she was raised in the Black Widow program, we can easily draw parallels between Dottie's character and Natasha Romanoff, from their martial-arts prowess to their seductive charm. For all you comic-fans, could Dottie really be Yelena Belova? That would certainly make sense.