The end credits for the episode "Rangers of Two Worlds: Part II", which was the last episode where the character Billy Cranston appeared, featured a montage of various shots of David Yost as Billy throughout the years, with just the Zeo instrumental music as audio.
The first episodes used an alternate logo in the intro that simply read "Zeorangers" in the same style as "Power Rangers" and had the five shapes (single oblong, double oblong, triangle, square, five-pointed star) below it.