Godzilla: The Series (1998)

S2E10 Area 51

Title: Area 51 Plot: The H.E.A.T. team ventures into the infamous Area 51 in Nevada, where they uncover a startling reality. Instead of extraterrestrial visits, they find that the real mystery lies in colossal mutated creatures lurking in the desert, spawned from years of covert nuclear testing beneath the surface.