In anticipation of tonight’s fourth season premiere of Stargate Atlantis, Yahoo! TV has released a brand new preview video.

The video features clips from tonight’s “Adrift,” and original interview snippets from actors David Hewlett (“Rodney McKay”) and Rachel Luttrell (“Teyla”), as well as executive producers Paul Mullie and Joseph Mallozzi.

“It’s definitely been a season of change,” Hewlett says, “and it’s really interesting to see how those changes have affected the way we work together — or the way we don’t work together, as the case may be!”

The video looks at the addition of Amanda Tapping and Jewel Staite to the show, the new and darker direction for Teyla, the addition of a new race, and the return of Dr. Carson Beckett.

Visit Yahoo! TV to see the video, and watch out for a few spoilers for what’s to come.

Season Four of Stargate Atlantis premieres tonight at 10 p.m. Eastern and Pacific (9 p.m. Central) on SCI FI Channel in the United States!