In "The Quantum Quest", Nadira is seen crying over an episode of Masked Rider (1995) on television at Ransik's lair. Masked Rider was an earlier Saban series that spun-off from the original Power Rangers series.
Writer/story editor Judd Lynn quit after writing the series finale, after constant pressure from Jonathan Tzachor's insistence that the show be more like it's Sentai counterpart. Lynn would later return to finish out the last 12 episodes of _Power Rangers RPM_ (2009), eight years later.
Digit was Circuit's name originally, and in fact, was his name until the week before the first episode aired. ADR dubbing has corrected this from being too apparent on the show, at least. How far into the series they called him Digit is unknown.
In The Legend Of The Clock Tower, the notion of an English Colony in Revolution-era California is nothing new to Power Rangers. Colonial Angel Grove was featured in Season 2's "Return Of The Green Ranger". This episode seems to reference that weird bit of alternate history.
Eric was originally slated to die, just like his counterpart in Timeranger. The writers were skeptical that Fox Kids would allow this, so they filmed two versions of the scene: one where he died, and one where he lived. Fox Kids, as expected, vetoed the death.
The originally planned ending had Jen staying in 2001 with Wes to keep the recurring theme going. But due to this trope this was thrown out the window, resulting in executive producer Judd Lynn quitting the show.
The writers of Time Force originally planned out a series where the Rangers travelled through time and fought across different time periods. Then they discovered that Mirai Sentai Timeranger didn't actually feature the characters actively travelling through time: they travel once to the year 2000AD and stay there.
In Force From The Future: Part 1, there's a big edit during the pre-credits scene. Ransik prepares to rush into the small time portal, and suddenly, we see him on the opposite side, as the Red Ranger enters holding his badge. Early promotions for this episode showed that Alex threw his Chrono-Saber at the time portal console, causing it to explode, and for Ransik to rush through the empty portal loop.
In the episode A Blue Streak, the cop who pulls Lucas over has a nametag with the name "B Mitchell" on it, a possible reference to Captain William Mitchell of Power Rangers Lightspeed Rescue (2000). Similarly, Mr. Picketts shares a last name with Kendrix lookalike Carolyn Picketts from Power Rangers Lost Galaxy (1999).
In Clash For Control, The Tyrannosaurus Rex attacking Eric & Wes in this episode was apparently a mix of animatronics and stop-motion. Other dinosaurs were animatronics (such as the Stegosaurus & Triceratops), while a few were CGI (the Pteradactyle).