Stan Lee makes a cameo describing the Division's operative as being like a superhero. (The Guardian season one, episode five)
Sonya is the only member of the regular cast whose last name is never revealed.
Alberta Watson, who plays the part of Senator Madeline Pierce, also played a character named Madeline in the 1997-2001 television series La Femme Nikita (1997). Storywise, Madeline then is what Amanda is now.
Lyndsy Fonseca and Noah Bean met on the show and have been in a relationship since. They married on October 2, 2016.
Maggie Q is the second Asian-American actress to star as the main character in an American drama series. Anna May Wong starred in "The Gallery of Madame Liu-Tsong" in 1951.