The General Grievous Halloween audiocast, featuring Matthew Wood voicing General Grievous, was an audio program launched on StarWars.com for the Halloween season of 2005. At first, only members of Hyperspace could access it, but starting on October 26, 2006, a downloadable version became available to everyone visiting the website. It was put back on the website again on October 31, 2014.
- The Hyperspace website featured a piece titled Hyperspace Presents Halloween AudioCast (the original content is no longer accessible, and a backup is unavailable)
- A StarWars.com article titled Star Wars Tricks and Treats (the original content is no longer accessible; backup link)
- A StarWars.com article titled Star Wars Halloween AudioCast: Feel the Force of Fright! (backup link)
- A StarWars.com article titled Star Wars Halloween 2016 Roundup! (backup link)