第49集。在那一集中迪迦奥特曼的人间体大古为了追寻外星人而穿越到了过去，最后外星人放出了宇宙怪兽进行破坏，大古变身迪迦但不敌，最后初代奥特曼的出现拯救了迪迦二人合力杀死了怪兽。这一集的目的主要是因为奥特曼播出三十周年而对初代进行致敬。
Episode 49. In that episode, Dago, the human body of Diga Ultraman, travels through the past in pursuit of aliens who eventually unleash cosmic monsters to destroy, Dagu turned into Diga but was defeated. Finally, the appearance of the first Ultraman saved Diga and killed the monster together. The main purpose of this episode is to pay tribute to the original generation for the 30th anniversary of the broadcast of the Ultraman.
迪迦奥特曼44集影子中，也出现了两个奥特曼，一个是大古变身的迪迦，另一个则是物理学家正木变身而成的邪恶迪迦奥特曼，在这一集中，迪迦奥特曼和邪恶迪迦战斗，最后在较量中迪迦获得了胜利，也是有两个奥特曼出现，不同的是一个是好的，一个是坏的！
