- California Doubling: As with the previous seasons, the Power Chamber exterior is The House of the Book performance hall and library building at the American Jewish University, Brandeis-Bardin Campus in Simi Valley, California.
- The Cast Showoff: Besides the obvious martial arts, Kat's ballet dancing and Tanya's singing.
- Creator Backlash: Heather's actress Sarah Brown has said the reason why she stopped acting along with refusing to attend conventions relating to Power Rangers and VR Troopers is that co-creator (and then-fiancé) Shuki Levy was physically abusive to her and that Haim Saban and his wife Cheryl were complicit in such a thing along with telling fans to boycott themnote and the franchise because of this.
- Descended Creator: Prince Gasket is voiced by Zeo's story editor, Doug Sloan.
- Edited for Syndication: The "Zeo serial" segments were naturally dropped from reruns of MMPR season 3 and MMAR, but strangely, the teaser that ran before it was kept well into the Jetix era. The two-part premiere also began with a different intro and lacked the flashback to the MMAR finale.
- Hostility on the Set: This is the reported reason why David Yost left the series, having endured years of the production crew making homophobic remarks toward him after it came out he was gay. Ultimately he couldn't take it any more (fearing that one more comment would drive him to kill himself), walking off set and never coming back, forcing his character to be written out.
- Jossed: David Yost said that Billy was never meant to be the Gold Ranger.
- Making Use of the Twin: Or rather triplets, since no special effects were used for the three Treys and were instead played by identical triplets.
- The Other Darrin: The Gold Ranger was voiced by Brad Hawkins, from VR Troopers, for his first few appearances.
- Pop Culture Urban Legends: "Scorpion Rain". Five one-minute shorts broadcast prior to Foxtel's screening of the final episodes of the season in Australia, created to better link the events of the finale to the feature film of Power Rangers Turbo. In actuality a hoax concocted by Big Name Fans Derik Smith, Joe Rovang, and Amit Bhaumik. Later subjected to Armed with Canon
- Real-Life Relative: Tommy's brother, David Trueheart, is played by Jason David Frank's actual brother, the late Eric Frank.
- Role Reprise: Austin St. John returns as Jason Lee Scott, the original Red Mighty Morphin' Ranger, in "A Golden Homecoming" to become the temporary host of Trey of Triforia's Gold Zeo Ranger powers.
- Unintentional Period Piece: The computer virus episode is filled with hilariously early-90s ideas of how computers and the Internet work.
- What Could Have Been:
- The Gold Ranger was originally supposed to be Ryan Steele from VR Troopers, hence Brad Hawkins doing the voice. This was scrapped for the triplet Triforians, and then the returning Jason.
- According to Trey's actors, he was originally intended to appear in far more episodes and star in a Spin-Off set on his home planet, but neither panned out.
- Solitications were sent out for a comic book crossover between the Zeo Rangers and Youngblood, but various issues with the comic studio kept it from happening.
- Theories abound that Billy's unexplained absences during the times he was suspected to be the Gold Ranger were him working on the creation of the Turbo powers.
- Word of God:
- Bhaumik's "Forever Red" retroactively establishing that there was a final, unseen conflict between Rita and Zedd and the Rangers which led to a damaged Serpentera buried on the moon, and Zeo writer Jackie Marchand's "Once A Ranger" revealing Rita was pregnant with Thrax by the events of the season finale.
- At different times, Bhaumik and Doug Sloan also went on record as saying that the ending to "A Season to Remember" is in-continuity and that Kat and Tommy are married in the future.
Trivia / Power Rangers Zeo