Flaming Ice (spoilers)
I can't believe they nuked those ice guys.
It's not like they were the greatest people themselves, but unless I missed something, it appeared they had been defeated, had given up on stealing the Seaview reactor or whatever they were trying to do, and were just trying to leave, so Ishmael blows them to smithereens?? I guess our sci-fi heroes had a different philosophy back then.