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  Operation Rainbow Monster! (怪獣レインボー作戦 Kaijū Reinbō Sakusen) is the seventh episode of Return of Ultraman.


Go and the Sakata siblings are all on a mountain excursion. While enjoying the day, Jiro takes a photograph of Go and his girlfriend in the top of a precipice. As they pose, Go's super hearing picks up a shrill sound that nobody else hears. Later, Aki has the pictures developed and to her surprise, some sort of monster has photobombed their picture without them knowing it. MAT investigates the location and comes up with nothing except scratch marks on some rocks by the river. They think that little Jiro has somehow doctored the photo as a prank. When the monster does reveal itself, MAT members discover it's a rock-like chameleon beast (Gorbagos), assimilating with its surroundings. They devise the 'Rainbow Plan', an air and ground maneuver where the Monster Attack Team will pellet the thing with a myriad amount of colors so that the monster will remain visible. Go Transformed into Ultraman & the monster was defeated.


Suit Actors




Home Media

  • Return of Ultraman Volume 2 features episodes 5-8.


  • This episode is the first since Ragon's attack in Ultraman that previous Kaiju attacks have been referenced, as Jiro is seen playing with a Red King figure.
  • The Kaiju Baragon is used and name dropped in this episode as Jiro and his friends make a Kaiju movie, fighting Red King.
    • The figure of Baragon is a Marmit.
Return of Ultraman Episodes
All Monsters Attack | Takkong's Big Counterattack | Evil Monster Realm of Terror | Definite Kill! Comet Kick | Two Giant Monsters Attack Tokyo | Battle! Monsters vs. MAT | Operation Rainbow Monster! | Monster Time Bomb | Monster Island S.O.S | Dinosaur Explosion Directive | Poison Gas Monster Appears | Revenge of Shugaron | Terror of the Tsunami Monsters, Tokyo's Big Pinch | Terror of the Two Giant Monsters, Tokyo in a Giant Tornado | Revenge of the Monster Lad | Mystery of the Big Bird Monster Terochilus | Monster Bird Terochilus - Tokyo's Big Aerial Bombing | Ultraseven Arrives! | The Giant Invisible Monster That Came from Space | The Monster Is a Giant Shooting Star in Space | Monster Channel | I'll Kill This Monster! | Dark Monster Spit out the Stars! | Horror! Mansion Monster's Birth | Leaving My Home Planet Earth | Mystery Homicide Beetle Incident | Go to Hell with This One Blow! | Ultra Special Operation | Jiro-Kun Rides a Monster | The Curse of the Bone God Oxter | In Between a Devil & Angel | Decisive Battle Under the Setting Sun | The Monster User and the Boy | The Life That Can't Be Forgiven | Cruel! Light Monster Pris-Ma | Kick the Night Away | Ultraman Dies at Sunset | When the Ultra Star Shines | Winter of Horror Series - the 20th Century Abominable Snowman | Winter of Horror Series - Phantom Snow Woman | The Revenge of Alien Baltan Jr. | The Monster That Stands on Mt. Fuji | Demon God Barks on the Moon | To the Starry Sky with Love | Assassinate Hideki Go! | This One Blow Filled with Anger | The Targeted Woman | I'm Taking the Earth | Space Warriors - Your Name Is MAT | Invitation from Hell | The 5 Ultra Oaths