A new alien is threatening the charming little town of Patience, Colorado. Syfy debuted the first trailer for Resident Alien season four, with a Harry imposter and several characters still reeling from their recent encounters with aliens.

Harry (Alan Tudyk) is still trapped in the Grey Moonbase prison, and the Mantid alien has assumed his life. As Sheriff Mike (Corey Reynolds) and Deputy Liv (Elizabeth Bowen) investigate strange deaths – which she thinks were perpetrated by aliens – Asta (Sara Tomko) begins to suspect there’s something wrong with Harry. Max (Judah Prehn) and Sahar (Gracelyn Awad Rinke) are back to their alien tracking, and Kate (Meredith Garretson) is learning how to fight in case she is abducted again.

Once the real Harry finally makes it home, he reveals that the Grey aliens implanted an inhibitor in him to keep him from shifting back to his original alien form. Not only that, the inhibitor is making him more human, which causes problems when his bird-like alien girlfriend comes back.

Season four will also see the returns of Alice Wetterlund, Levi Fiehler, Gary Farmer, Jenna Lamia, Sarah Podemski, Linda Hamilton, and Enver Gjokaj. Jewel Staite and Stephen Root are set to guest star in the new season.

Resident Alien season four will debut on June 6, 2025, on both USA Network and Syfy.