Black Widow, out now on Disney+ and in theaters, is the first Marvel Cinematic Universe film to be released in over two years. On its opening weekend, it earned $60 million from on-demand sales and an additional $159 million from the global box office. This past weekend has brought the global take to $264 million total.

The film is one of the grittier entries in the MCU thus far, more in the vein of Captain America: The Winter Soldier than Guardians of the Galaxy. For over a decade, we’ve heard Natasha Romanov allude to the “red” in her ledger. In Black Widow, we get a small taste of the red that Natasha grew up in, enabled, and ultimately escaped.

The movie, predictably, does not change Natasha’s ultimate Endgame fate. This may be the last time we see Scarlett Johannson as Black Widow, and if so, this is a great movie for her to go out on. It solidifies Natasha’s legacy, and it begins one for Yelena Belova—played by Florence Pugh—who may eventually adopt the Black Widow moniker herself.

Here are 21 Easter Eggs and references that stood out in Black Widow, the first film in the MCU’s Phase 4 rollout.