Code Name: Diamond Head is perhaps best known now for having received the Mystery Science Theater 3000 treatment, but before that happened it was simply another Quinn Martin movie. Like many other QM productions, this one was a pilot for a projected weekly series. It never made it to that stage, instead becoming a cult favorite following television reruns up through the late-1980s and a VHS release.
Roy Thinnes, star of Code Name: Diamond Head: