|This article is about a/an episode in Himitsu Sentai Gorenger.|
A Blue Spark! The Spy Front That Floats in the Sea (青い火花! 海に浮かぶスパイ戦線 Aoi Hibana! Umi ni Ukabu Supai Sensen) is the nineteenth episode of Himitsu Sentai Goranger.
The Gorenger's attempt to get their hands on the plans for a new super weapon become hindered when the informant decides to profit off the Black Cross Army's desire.
to be added
to be added
- This episode aired on NET the same day episode 21 of Kamen Rider Stronger, Samegashima, Decisive Battle in the Sea!, aired on TBS.
- Miss Sapphire was portrayed by Yukie Kagawa; she would return notably as one of the two female spies of Egos in ep. 21 and 22 of Battle Fever J and as Amazon Killer in Taiyou Sentai Sun Vulcan.
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.