Graduation Blues

Cast

 * Catherine Sutherland as Kat Hillard (Zeo Ranger I Pink)
 * Nakia Burrise as Tanya Sloan (Zeo Ranger II Yellow)
 * Steve Cardenas as Rocky DeSantos (Zeo Ranger III Blue)
 * Johnny Yong Bosch as Adam Park (Zeo Ranger IV Green)
 * Jason David Frank as Tommy Oliver (Zeo Ranger V Red)
 * David Yost as Billy Cranston
 * Karim Prince as Cestro
 * Paul Schrier as Bulk
 * Jason Narvy as Skull
 * Gregg Bullock as Lt. Jerome Stone
 * Henry Cannon as Mr. Caplan
 * David Fielding as Zordon
 * Bob Manahan as Zordon (voice)
 * Donene Kistler as Alpha 5
 * Richard Steven Horvitz as Alpha 5 (voice) (as Richard Wood)
 * Danny Stallcup as Goldar
 * Kerrigan Mahan as Goldar (voice)
 * Danny Stallcup as Rito Revolto
 * Bob Papenbrook as Rito Revolto (voice)
 * David Stenstrom as King Mondo (voice)
 * Alex Borstein as Queen Machina (voice)
 * Barbara Goodson as Prince Sprocket (voice)
 * Oliver Page as Klank (voice)
 * Barbara Goodson as Orbus (voice)
 * Dan Woren as Hydro Contaminator (voice)

Trivia

 * First appearance of the Zeo Blaster combo
 * The schematic parts that Billy uses for the Zeo Blaster are actual toys ftom the Bandai toy line.
 * Cestro does not morph in this episode despite being confronted by the Hydro Contaminator monster.
 * The Hydro Contaminator which is one of the Alien Rangers' enemies serves as a Baranoia monster in Ohranger.