First mention of Stone Canyon, a neighbor city of Angel Grove where later on Rocky, Adam and Aisha would come from.
The "smell-o-meter" Bulk uses to try and sniff out the Power Rangers with Skull, features the snout from the monster Pudgy Pig ("Food Fight" and "A Pig Surprise"). Pudgy Pig could have made more appearances on the show like other monsters, but by the time this episode was made, the monster suit had fallen apart rather quickly after being used in production.
Trini's love interest Richie is introduced on the show as a new student in Angel Grove High.
When Tommy and Kim are morphing it usually green then pink. When they do it its reverse with pink 1st then green.
Last time you hear Jason and Zack voices as they morph in action while fighting.