A 5 disc set of Terrahawks will be released in the US on 27th January 2004. It comes with 39 episode and does contain some extras as well:

Commentary with Director Tony Bell and Associate Producer Bob Bell on "Gunfight at Oakey's Corral"

Commentary with Effects Director Steven Begg on "From Here to Infinity"

Photo Gallery: Production Stills Slideshow Narrated by Steven Begg

Photo Gallery: Tony and Bob Bell at Bray Studios

Terrahawks Revealed: Ten Codes,History, Vehicles, and Character Descriptions