Giant Robo
Genres: Action
Type: Special, Episodes: 1
Aired: Jul 27, 2007
Studio: OLM
Source: Manga
Rating: G - All Ages
Synopsis:
The pilot for GR: Giant Robo. However, there were significant changes between the pilot and the actual show, including a different writer and a different director. Thus, the special is less a promo for the series than an alternate version of how the series might have looked.

(Source: Orphan)