List of Bleach episodes (season 1)

The Agent of the Shinigami arc (死神代行篇) is the first season of the Bleach anime series. The episodes are directed by Noriyuki Abe and produced by TV Tokyo, Dentsu, and Studio Pierrot. In the English release by Viz Media, its title is translated as The Substitute. The episodes are based on Tite Kubo's Bleach manga series, and adapt the first eight volumes of its source material over twenty episodes. The episodes' plot covers the adventures of Ichigo Kurosaki after becoming a Soul Reaper and assuming the duties of Soul Reaper Rukia Kuchiki.

The arc initially ran from October 2004 until February 2005 in Japan on TV Tokyo. The first English airing of the series was from September 2006 until January 2007. It was shown on both YTV's Bionix and Cartoon Network's Adult Swim programming blocks, with Bionix airing the show one day sooner. The arc started airing in the UK starting in September 2007 on AnimeCentral.

The episodes use three pieces of theme music: one opening theme and two ending themes. The opening theme is Orange Range's single "Asterisk". The ending theme for the first thirteen episodes is "Life is Like a Boat" by Rie Fu, while the remaining seven used "Thank You!!" by Home Made Kazoku.

The arc was released on five DVD compilations, each containing four episodes of the show. They were released in Japan from February 2, 2005 to June 1, 2005. The first of these compilations, with art featuring the series main character Ichigo Kurosaki, was nominated at the American Anime Awards in 2007 for best DVD package design. A DVD collection box, containing all twenty episodes of the arc, was released by Viz Media on October 30, 2007. In addition to the television episodes listed below, the first of the two Bleach original video animations, "Memories in the Rain", falls into the Agent of the Shinigami arc, being an alternate version of episodes eight and nine that was shown at the 2004 Jump Festa.