- 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 fan 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. She also pleaded her fans to boycott the Power Rangers franchise, Saban and Levynote because of this.
- Kat's actress Catherine Sutherland has said that she's not a fan of the romance between her character and Tommy.
- 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 anymore (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.
- Continuing from the Mighty Morphin' days, Jason David Frank was still holding on to his beef with Austin St. John by the time the latter returned to the show as 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 before the DiFilippo triplets were cast as a result of a casting scheme that Shuki Levy wanted to go with.
- For Billy's sendoff, since David Yost had already walked away from the series, they had an older unidentified actor play him despite said actor not getting down the mannerisms of the character. Also, stock footage of Yost was used while using a dubber that only bore a passing vocal similarity to the original actor, similar to the soundalikes dubbing Jason, Zack, and Trini in the middle of MMPR Season Two.
- 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 fans Derik Smith, Joe Rovang, and Amit Bhaumik. Later subjected to Armed with Canon.
- Prop Recycling: The Starboard Winger had a traditional pilot scarf and rounder eyes.
- Real-Life Relative: Tommy's brother, David Trueheart, is played by Jason David Frank's actual brother, the late Erik Frank.
- Reality Subtext: "Invasion of the Ranger Snatchers" has Rocky getting a job as an extra on a sci-fi film and feeling his talents were squandered. In a 2013 interview, Steve Cardenas admitted that he left Power Rangers because he felt his pay wasn't enough for him to continue playing Rocky.
- 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: Enough for its own page
- 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.
- Word of God: David Yost said that Billy was never meant to be the Gold Ranger. He speculates that his character was never considered for it due to the producers felt that as a gay man in real life, Yost wasn't worthy of being where he was as a children's superhero which may have also played a part in Billy being removed as a ranger in the beginning.
- You Look Familiar: Heather Thompson's actress, Sarah Brown, had recently come off of Saban's canceled VR Troopers as one of the leads.
Trivia / Power Rangers Zeo