Ohranger is considered to be the 3rd lowest rated Sentai show with a rating of 4.5% after Go-Busters with 4.0% and Kyoryuger with 3.9%. The explanation is the fact that it was meant to be a darker show (human terrorists attacking Japan) but the script had to be re-written because of the Tokyo Subway Attacks and the Great Hanshin Earthquake that put Ohranger into a mix-up between dark and comical episodes. Thus the ratings drastically decreased, leading to the almost-cancellation of the Sentai franchise.
Haim Saban adapted this show into Power Rangers Zeo
The events leading up to this series took place 600 million years earlier, marking the earliest point in the Sentai timeline so far.
This is the last season to have the annual Sentai movie (with the exception of Kyukyu GoGo-V the Movie: Sudden Shock! A New Warrior) until the release of Hyakujuu Sentai Gaoranger: The Fire Mountain Roars. Coincidentally, both the end and the start of the Sentai films occur alongside anniversary seasons.
This is also the first season to have a "Vs. series movie", where the current Sentai encounters the previous year's sentai, starting with Chouriki Sentai Ohranger: Ole vs. Kakuranger.