Agents of SHIELD visits 1950s era Area 51 in episode 3 and this time, they are the alien invaders. In addition to the Chronicoms, the other alien invaders who want to use a failed SHIELD science project to take over the world. Obviously.
To infiltrate the base, Jemma impersonates Peggy Carter while Coulson impersonates a second agent who’s been abducted by
alien invaders the SHIELD agents. It all goes great until Peggy’s old partner, Daniel Sousa (Enver Gjokaj), shows up to supervise the latest experiment.
It’s time to go back to the future from the past! But we’re not ready to go back to the present yet. First, the Chronicoms make a stop in Groom Lake Nevada, 1955, home of alien conspiracy theory ground zero, Area 51. Zephyr 1 is hot on the Chronicoms trail, so they pop into the Nevada sky soon after, startling a couple of teens who are out stargazing in the desert.
The agents quickly take stock, remembering that Enoch didn’t make it onto the ship and figuring out that they’re still 65 years from home. Coulson reasons that it’s better to be in flight and cloaked when they jump.