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Season 4 of the machinima comedy series Red vs. Blue: The Blood Gulch Chronicles began airing August 29, 2005. It continues the story with the Reds returning to Blood Gulch and the Blues going on an ancient quest. This season features 20 episodes, as opposed to the standard 19 for the first three seasons, a first for the series. This season also features an alien model character, another first. The Season 4 DVD was released on May 4, 2006 and arrived in GameStop stores on May 9, 2006. It is the fourth full season of Red vs. Blue.