Assault Neograd (突撃ネオグラード Totsugeki Neogurādo) is the fiftieth episode of Choudenshi Bioman. It is the fourth episode of Bioman's five episode endgame, featuring the final showdown between Bioman and their Bio Robo and Bio Hunter Silva and Balzion, as well as the final appearances of Mason, Psygorn and Professor Shibata.