ウルトラシリーズ
is the first season of its series that is the 22nd entry in the Tsuburaya Productions' long-running Ultra Series. It is an adaption of the video game "Mega Monster Battle: ULTRA MONSTERS". The show first aired on December 1, 2007 and concluded on February 23, 2008. On December 20, 2008, the second season titled premiered. "Ultra Galaxy" was the first Ultra Series to be shown as a pay-per-view service.