From Thunderbirds to Space 1999, this guy was top of his game in the scifi field. Thanks, Gerry
Edit: Adding stuff
Here's the intro to his live-action series, UFO. I'm convinced that this television show was the inspiration for the folks who ended up developing the classic videogame X-Com. Defend Earth, shoot down UFO's, and then land at the crash sites to collect alien technology. Yeah.