This marks the first regular appearance of the Power Rangers' Power Crystals, which contain the essence of the Rangers' morphing powers. They were previously seen as joysticks in the control room of each Ranger's Zord.
In the closeup of Zack's Power Crystal, Walter Jone's lack of a middle left finger is noticeable.
This episode contains the first reference to the Morphing Grid.
This is not the first time the Rangers use the Power Crystals, as they had been used as joysticks for the Zords since Day of the Dumpster.
This is the first time the Rangers use the Power Sword successfully, as Goldar had fled when it was summoned in Day of the Dumpster, and the first time the Zords fight more than one monster.