Zordon Era

The Zordon Era is an unofficial term, created by the fans of Power Rangers, to refer to the first six season of Power Rangers, including Mighty Morphin Power Rangers, Power Rangers: Zeo, Power Rangers: Turbo, and Power Rangers In Space. It is called the Zordon Era because Zordon, one of the most influential characters of the era, died at the end of the Zordon Era, in Countdown to Destruction.

Other similarities
Other than Zordon being a main character, there were also several similarities that were abandoned (some, without explanation) after the Zordon Era ended (a point that is unofficially referred to as the Post Zordon Era).

Similarities include:
 * Every season was a continuation of the previous one.
 * The Rangers were assisted by a sentient robot named Alpha (this would be continued for one more season in the first season of the Post Zordon Era, Lost Galaxy).
 * With the exception of In Space, the Rangers' mentor lived inside a glass tube.
 * The Rangers attended high school.
 * Every season of the Zordon era took place in the fictional city of Angel Grove.
 * Bulk and Skull provided comic relief.
 * The Rangers, unlike their Sentai counterparts, had the ability to instantly teleport to any destination (even between temporal dimensions).
 * The rangers all wore communication devices, simply called "communicators," on their wrists.
 * With the exception of In Space, the Rangers held their base of operations in a futuristic place called the Command Center or the Power Chamber.