44: Quest for the Crystal Part 1

The rangers' powers are starting to weaken, so the rangers are sent by Tommy and Katherine to find the Zeo Crystal, hidden in the Zeo Cave by them, Tanya, Adam, and Rocky. But, Dusklor tries to get the Zeo Crystal first, and sends his spectrals after the rangers. Though Zordon, before he perished to save the universe, installed traps in the cave and hidden entrances leading to nowhere. Using Tommy's knowledge of how Zordon thinks and Katherine's knowing of where the crystal is, the rangers find the crystal, but are soon ambushed by spectrals.
 * First appearances of the Zeo Crystal