You never know who's going to drop by the Die Nasty stage at the Fringe Festival. Monday night, audience members got a special treat: Edmonton's own Nathan Fillion and his friend Allan Tudyk did some hilarious cameos. Fillion has been in "Desperate Housewives," "One Life to Live" and the Hollywood movie "Serenity".

Click on the "Watch Video" link to find out what he's been up to lately in Hollywood.

To learn more about Dr. Horrible, visit  www.drhorrible.com.
Check out www.castletv.net to find out more about Nathan's projects.