|This article is about a/an episode in Himitsu Sentai Gorenger.|
Blue Miracle! The Mysterious Airship That Came From Antiquity (青い驚異! 古代から来た怪飛行船 Aoi Kyōi! Kodai Kara Kita Kai Hikōsen) is the twenty-first episode of Himitsu Sentai Gorenger. Following the introduction of Iron Man Mask General Temujin in the previous episode, it is the first part of a three-part arc featuring the warship which destroyed Atlantis.
Shinmei helps a professor and his son discover an airship that destroyed Atlantis in antiquity while preventing the Black Cross from reactivating it.
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- This episode aired on NET the same day episode 23 of Kamen Rider Stronger, The Devil of the Underground Kingdom!!, aired on TBS.
- This is the first actual cliffhanger in Sentai history; not merely introducing a new villain like certain previous Gorenger but having a continuous story for multiple parts.
Himitsu Sentai Gorenger Volume 4 features episodes 19-24: Ep. 19: A Blue Spark! The Spy Front That Floats in the Sea, Ep. 20: Crimson Fight to the Death! Sun Halo Mask vs. Akarenger, Ep. 21: Blue Miracle! The Mysterious Airship That Came From Antiquity, Ep. 22: Yellow Air Raid! Nightmares of Atlantis, Ep. 23: Green Dogfight! The End of the Mysterious Airship, and Ep. 24: Blue Anger! Strong Greenmerang, Big Counterattack. 
Blu-ray Box 2 comes with 17 episodes.