The Invincible Cosmos
Dr. Umon calls Daisuke and Koji to show them the way that Grendizer and Double Spazer can unite together and fly. The objective of this is to minimize the need for Grendizer to have to lock in and out of Spazer as these are Grendizer's weakest moments and he is helpless in them.

Cast
Kei TomiyamaDuke Fleed / Daisuke Umon (voice)
Hiroya IshimaruKoji Kabuto (voice)
Joji YanamiGenzo Umon / Great King Vega (voice)
Chiyoko KawashimaHikaru Makiba (voice)
Kosei TomitaDanbei Makiba / General Gandal / Nuke / Whiter (voice)
Kazuko SawadaGoro Makiba / Lady Gandal (voice)
Rihoko YoshidaGrace Maria Fleed / Commander Marine (voice)
Banjo GingaScience Minister Zuril (voice)
Kenichi OgataBlaki / Bunta Arano (voice)
Keaton YamadaAkira Hayashi (voice)UFO Robot Grendizer on tvt

