When Zordon is telling Jason, Zack, and Trini something in the Command Center about leaving, you can hear the transition from the dubbed voice of the uncredited actress for Thuy Trang to the actual voice line. "There has to be another way" was a line from Thuy Trang episode "Welcome to Venus Island".
Before the rangers get zapped with energy bolts, you can clearly see the dot on the costumes where the explosion is about to hit and take place on them.
Sillverhorns monster will be reused and repainted to the monster used in "A Friend in Need" episodes for what is supposed to be season 3 1 to 3.
Why do the rangers need the sword of light to transfer the rangers power? When Kimberly left all she did was give her coin to Kat. It maybe because at this time the Rangers had their Dino powers and next season the Rangers switched to ninja powers before Kimberly passed her powers to Kat.