Okay, I've got a hell of a poser for you: way way back in '74 or '75, there was an animated TV movie that seemed to center around nuclear terrorism; specifically a group of terrorists using a computer (named – I swear I didn't imagine this – "Tarzan"), and threatening to detonate a nuclear weapon. I remember being right freaked out by the leader of the group as he sat in their bunker, reading a list of demands, his face – heck, his whole self – covered in what I now know was a nuclear/biological/chemical warfare suit (you know, full face gas mask, hood, gloves etc.) The group and their aims were unclear to my 5-year-old self, but it seemed less political and more cult-like. The culmination was that the bomb did go off, and one of the bad guys (possibly the leader) was thrown or fell out of a helicopter as it flew over the ruined city. I've tracked down every weird sci-fi or horror movie I was exposed to back when I was a tyke except for three, and this is one of 'em. The others are a beautiful, almost sketch-art like cartoon about fairies, the other about two kids who travel time after drinking from a fountain in the courtyard of an old mansion.
Anyway, thanks for listening, I hope maybe someone there can be of help.