Black Widow is a superhero film in the Marvel Cinematic Universe, featuring David Harbour as one of the main characters. The movie explores the backstory of Natasha Romanoff, also known as Black Widow, played by Scarlett Johansson. David Harbour portrays the character Alexei Shostakov, also known as Red Guardian, a Russian super-soldier. The film delves into Natasha's past and her journey to confront her dark past and the dangerous conspiracy that threatens her life. With its action-packed sequences and compelling storyline, Black Widow offers an exciting addition to the Marvel franchise.