When one of MAT's officers crashed on Dangar's island while delivering a Monster Sonar, MAT came to rescue their friend, but had accidentally disturbed Dangar's sleep while he was in a cave. Awakened, Dangar proceeded to attack MAT and shrug off all their assaults. Hideki Go began attacking, but his craft ran out of fuel and crashed. As Dangar closed in on the crash, Goh was transformed into Ultraman Jack to battle Dangar instead. The two fought a lengthy battle until volcanic eruptions surrounded them. Jack finally managed to tear Dangar’s dreadlocks off and threw him to the ground before firing the Specium Ray into Dangar’s head, killing him.
郷は、ニューヨークのＭＡＴ技術局が開発した高性能の怪獣探知機を受け取る任務を命じられる。だが、その日はあいにく次郎の誕生日。事情を察した南隊員は、隊長に内緒で郷の代わりを引き受け、マットアローで基地を飛び立っていく。だが、その南隊員が消息を絶ってしまった。責任を感じた郷は、南の救出に全力を注ぐ。
