M.A.S.K. Season 1 Episode 13 The Creeping Terror ( Air Date 1985-10-16 ) Genre Action & Adventure, Animation, Kids category. Overview "Location: Some Jungle VENOM has genetically altered caterpillar eggs to create giant caterpillars. They are using the giant caterpillars to clear away the vegetation in the jungle to reveal a map carved on the jungle floor. The map leads to the Hidden Valley, the location of an ancient source of great power -- a Myan crystal.".