Captain America: The First Avenger
Archive footage from "Captain America: The First Avenger", including the apparent death of Captain America from the end of that film, is used throughout the episode, and the MacGuffin of the episode, molecular nitramene, is based on the Vita-Rays that were used to transform Steve Rogers into Captain America in the film. The Vita-Ray detector that Carter uses in the episode belonged to Dr. Abraham Erskine, who was portrayed by Stanley Tucci in "The First Avenger". The Oil Refinery featured at the climax of the episode belongs to Roxxon Oil, a company that has appeared throughout the MCU.