Comment Don't forget "UFO" (Score 1) 129
Just as good in many ways as "Space:1999" (which I also loved) was his 1969 series "UFO", which combined live action with some of the sci-fi puppetry from the Thunderbirds. It was dark and foreboding, centered on a secret government agency in an active war against recurring alien incursions, and you had the feeling that "we" were just at the edge of losing. It included an AI satellite which spoke with an English accent and a moonbase "manned" by women in purple hair and short skirts, one of the very few silly parts of an otherwise very serious drama. It seems to have influenced MIB in more ways than one; one of the secret organizations' special tools was a spray that took away ones recent memories, used on witnesses after debriefing, a tool re-incarnated as the "flashy-thing".
Gerry was quite the visionary, and certainly influenced this old slashdotter.