In the second sequence in Rita's Palace, at the start, Goldar can be seen sleeping against the wall as Rita calls Finster for a monster idea.
According to the MMPR Interactive CD-ROM, assuming the series takes place in 1993, the events of this episode took place on May 3, 1993, the date given as Zack's birthday.
Jason suggests that the Power Rangers are space aliens from a distant planet when Ernie mentions a rumor that they are regular humans. True Alien Rangers would appear to replace the incapacitated Earth Rangers in the third season.
Finster's book of monster designs features drawings of several Power Rangers monsters that had either previously appeared or would appear later. The monsters shown in the book were Bones (from "High Five"), King Sphinx (from "A Pressing Engagement"), Mr. Ticklesneezer (from "For Whom the Bell Trolls"), Snizard (from "Foul Play in the Sky"), Chunky Chicken (from "Big Sisters"), Genie (from "Switching Places"), and on page 12, Knasty Knight.
In the flashback footage about the Knasty Knight, it is fighting the Black Ranger (MammothRanger) from the original Super Sentai show Kyoryu Sentai Zyuranger, Goushi.