Watch the new Season Four preview!

The latest teaser video for Stargate Atlantis Season Four premiered at Comic-Con last month, and fans around the world can now check it out at Yahoo! TV! It should go without saying: Beware of spoilers in the video, and below in this report.

The 2-minute preview features a quick recap of some moments from the past 10 years of Stargate, and a flurry of clips from episodes in early Season Four. We spotted what looks like moments from “Adrift,” “Doppelganger,” “Travelers,” and “Missing.”

The clips confirm Samantha Carter’s promotion to full-bird Colonel (Lt. Colonel Sheppard congratulates her with a salute), and implies an impending alliance with the Wraith. The show’s two newest cast members, Amanda Tapping (“Samantha Carter”) and Jewel Staite (“Jennifer Keller”) are also featured, as is recurring guest star Jill Wagner (“Larrin,” the leader of the new race of humans introduced in “Travelers”).

The fourth season of Stargate Atlantis premieres Friday, September 28 at 10 p.m. Eastern/Pacific on SCI FI Channel in the United States. Visit GateWorld’s episode guide to learn more about what’s to come!