Zoltar is unmasked for the first and only time in the show. However, as soon as Mark rips his mask off, all the G-Force members see is a mane of long blonde hair, and then there is a flash of blinding light caused by the Spirit. Mark concludes that Zoltar is a woman. In the original show that Battle of the Planets is based on, known as Gatchaman, Zoltar (or Berg Katse as he was originally known as) is revealed to be a gender-shifting hermaphrodite, and that his sister, Mala, is actually him in his female form.