Project Blue (プロジェクト・ブルー Purojekuto Burū) is the 19th episode of Ultraseven.
Dr. Miyabe is working on Project Blue, a plan to develop a defense barrier around the Earth to protect from alien threats. Late one night after returning home to be with his wife, the doctor sees a monster in his room. The next day, he discovers an underground laboratory beneath his kitchen! Descending the labyrinthine stairs, he's captured by an alien being known as Bado. After an informative discussion, Bado demands Miyabe hand over his plans for Project Blue so Bado's alien brethren may enter the Earth's atmosphere to destroy the planet. It's up to the Ultra Guard and Seven to rescue him.
- Dan Moroboshi/Ultraseven (モロボシ・ダン／ウルトラセブン（声） Moroboshi Dan/Urutorasebun): Kohji Moritsugu (森次 晃嗣 Moritsugu Kōji)
- Anne Yuri (友里アンヌ Yuri Annu): Yuriko Hishimi (ひし美 ゆり子 Hishimi Yuriko)
- Shigeru Furuhashi (フルハシ・シゲル隊員 Furuhashi Shigeru): Sandayū Dokumamushi (毒蝮 三太夫 Dokumamushi Sandayū)
- Kaoru Kiriyama (キリヤマ・カオル Kiriyama Kaoru): Shoji Nakayama (中山昭二 Nakayama Shōji)
- Soga (ソガ Soga): Shinsuke Achiha (阿知波信介 Achiha Shinuske)
- Amagi (アマギ Amagi): Bin Furuya (古谷敏 Furuya Bin)
- Narrator (ナレーター Narētā): Hikaru Urano (浦野光 Urano Hikaru)
- Ultraseven (ウルトラセブン Urutorasebun): Koji Uenishi (上西弘次 Hirotsugu Uenishi)
- Ultraseven Volume 5 Features Episodes 18-21.
- "Project Blue" was the working name of the film, Ultraman Cosmos 2: The Blue Planet.