Power Rangers: Zeo

Season overview

Task: Write a JSON object for "Power Rangers" Season 4.
Constraints: Use only provided synopsis and sources. No invented facts. No markdown. No asterisks. No headings. No bullet points in the text (though the primer is an array of 4 strings).
Output Format: Valid JSON only.
Keys:
overview: 160-220 word summary of the narrative arc.
primer: Array of exactly 4 concise strings summarizing previous lore/stakes.
TMDB Season Synopsis: "The tyrannical Machine Empire arrives to conquer Earth. Drawing on newfound powers from the legendary Zeo Crystals, the Power Rangers are reborn stronger than before."
Source [1]: Mentions "teenagers with attitude are recruited to save Angel Grove from the evil witch".
Source [3]: Mentions the series lasted three seasons (August 28, 1993 to November 27, 1995).
Source [4]: Mentions Rita Repulsa and her army of monsters emerge from space to conquer Earth, and five teenagers use dinosaur powers to become Mighty Morphin Power Rangers.
Overview Construction:
The narrative of this season centers on the arrival of the tyrannical Machine Empire, which seeks to conquer Earth. In response to this threat, the Power Rangers must adapt to protect the planet. They draw upon newfound powers derived from the legendary Zeo Crystals, which allow them to be reborn stronger than they were previously. This transition marks a significant shift in their abilities as they face the new imperial forces. While previous conflicts involved the alien sorceress Rita Repulsa and her army of monsters emerging from space to threaten Earth, the current struggle is defined by the Machine Empire's conquest attempt. The Rangers, who were originally five teenagers with attitude using dinosaur powers to defend Angel Grove, now utilize the strength of the Zeo Crystals to meet the challenges posed by the new enemy. This season follows the team as they harness these legendary crystals to combat the incoming tyranny and ensure the survival of Earth against the Machine Empire's forces.
Word Count Check (Overview):
"The narrative of this season centers on the arrival of the tyrannical Machine Empire, which seeks to conquer Earth. In response to this threat, the Power Rangers must adapt to protect the planet. They draw upon newfound powers derived from the legendary Zeo Crystals, which allow them to be reborn stronger than they were previously. This transition marks a significant shift in their abilities as they face the new imperial forces. While previous conflicts involved the alien sorceress Rita Repulsa and her army of monsters emerging from space to threaten Earth, the Rangers, who were originally five teenagers with attitude using dinosaur powers to defend