Do you know what a dilithium crystal is? Ever use the term "cosplay" when discussing your weekend plans? Own more than two non-Star Wars action figures? If you answered "Affirmative!" to any of these questions, then you'll be staying home this Friday night, because you're a nerd. It's cool. That means you'll be able to catch this week's ep of Stargate Atlantis, with guest stars Dave Foley, Bill Nye the Science Guy and astrophysicist Neil deGrasse Tyson. All nerds, by the way.

Kids in the Hall vet Foley plays a professional rival of Dr. McKay (David Hewlett), who invents an anti-global warming device that, instead of ending global warming, almost kills everybody at a swanky party, including Nye and DeGrasse Tyson. Not intrigued? Gateworld says there might be a scene with Jewel Staite stuck in a giant freezer. I know. It's a good show.

Seriously, I love Stargate Atlantis. It's one of those shows that repackages age-old sci-fi cliches but manages to deliver a lot more than just campy fun. It's got great action, humor, and the space battles look surprisingly good in high-def. Plus, David Hewlett is one of my favorite genre actors, and the spotlight will be on him this Friday.

This episode, titled "Brainstorm," looks to be one of the goofier entries for this final season. And if there's one thing the Stargate franchise gets right, it's goofy. So, take a break from "Mortal Kombat vs. DC Universe" on Friday and tune in to Sci Fi Channel at 9 p.m. (8 p.m. Central). Make sure to check out this preview clip first.