This is the first time Kingpin is shown, portrayed by Vincent D'Onofrio, who played the character in a Netflix series. This marks the first time a character and actor from a Netflix series has reprised their role in a Marvel Studios production.
This marks the second time a character and actor from a Marvel Television series has reprised their role in a Marvel Studios production, the first being James D'Arcy reprising his role of Edwin Jarvis from Agent Carter in Avengers: Endgame.
Kate introduces herself to the Uber driver as Tabitha, which was the name of Roger Harrington's wife who pretended to be blipped and ran off with another man.
Clint knows about Yelena, meaning whilst Natasha kept her adoptive family a secret, she only told Clint about her sister.