The "Princess Knight" anime series was produced by Mushi Production and had Osamu Tezuka as executive director, and Chikao Katsui and Kanji Akabori as chief directors. The series of 52 episodes was originally broadcast in Japan on Fuji TV from April 2, 1967 to April 7, 1968. In addition to the anime series, there is also 28-minute pilot film that was produced in November 1966 but was not broadcast on television. It was released as an extra when the series was released on LaserDisc in Japan. All episodes were released on LaserDisc by Pioneer on March 28, 1997. The episodes were also distributed in DVD format; Nippon Columbia released two box sets on December 21, 2001 and June 1, 2002. A single box set was released by Columbia on July 23, 2008, and another was released by Takarashijima on October 29, 2010. A "Best Selection" DVD series was first released by Columbia on September 25, 2003, and rereleased on July 23, 2008.