|This article is about a/an episode in Power Rangers Zeo, the second installment in the Zordon Era.|
When Tommy finds himself plagued by troubling dreams, he finds himself returning to an old friend for guidance and learns more than he anticipated. Meanwhile, the Zeo Megazord is incapacitated in a battle with Main Drain, a monster that can drain the life force from mechanical beings, requiring Tommy to master the power of the new Red Battlezord to defeat him.
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- Jason David Frank as Tommy Oliver (Zeo Ranger V Red)
- Johnny Yong Bosch as Adam Park (Zeo Ranger IV Green)
- Steve Cardenas as Rocky DeSantos (Zeo Ranger III Blue)
- Nakia Burrise as Tanya Sloan (Zeo Ranger II Yellow)
- Catherine Sutherland as Katherine "Kat" Hillard (Zeo Ranger I Pink)
- David Yost as Billy Cranston
- Paul Schrier as Farkas "Bulk" Bulkmeier
- Jason Narvy as Eugene "Skull" Skullovitch
- Gregg Bullock as Lt. Jerome Stone
- Henry Cannon as Mr. Caplan
- Richard Genelle as Ernie
- Frank Salsedo as Sam Trueheart
- Erik Frank as David Trueheart
- David Fielding as Zordon (face)
- Bob Manahan as Zordon (voice)
- Donene Kistler as Alpha 5
- Richard Steven Horvitz as Alpha 5 (voice)
- David Stenstrom as King Mondo (voice)
- Alex Borstein as Queen Machina (voice)
- Barbara Goodson as Prince Sprocket (voice) and Orbus (voice)
- Oliver Page as Klank (voice)
- Brad Orchard as Main Drain (voice)
- ??? as Delmar
- Michael R. Gotto as Young Tommy (archive footage only)
- First appearance of Tommy's biological brother, David.
- It is revealed that Alpha sleeps in this episode. When Tommy in shown waking him, Alpha is standing in the small alcove in the wall when he wakes up. In For Cryin' Out Loud, however, he appeared to have been asleep on the medical table when Billy revived him.
- Alpha is shown here wearing a nightcap, having been awakened from his sleep mode.
- Tommy tries to get the Red Battlezord to copy the movements he makes, a tactic he first tried (much more successfully) with the White Tigerzord in Mighty Morphin's "White Light".
- Main Drain is the first monster to have broken a Megazord's weapon.
- Last appearance of Mr. Caplan for the season, though he is mentioned in "The Joke's on Blue" to be on vacation. He makes his next appearance in Turbo's "Shift Into Turbo, Part 2".
- When Main Drain first appears, he is wearing the upgrades that he would gain later fighting the Zeo Megazord.
- When Orbus lands on the side of Main Drain, the monster is suddenly colored silver (in reality, the footage used is from when Orbus enlarged Silo).
- 5-4-1 (instrumental)