The fourth season of "SpongeBob SquarePants" premiered on May 6, 2005, with the episodes "Fear of a Krabby Patty" and "Shell of a Man". The season ended on July 24, 2007 with the episode "Squid Wood". Unlike the previous seasons, season four was released in two volume DVDs. The volume one DVD was released in region one on September 12, 2006. The volume two DVD was released in region one on January 9, 2007, with nine episodes from the season being released on that DVD before airing on American television. The season set was released in its entirety in region two on November 3, 2008. 38 episodes were produced this season.