What Was The Golden Age Of Television Science Fiction and Fantasy?

Some people say we're living in the golden age of genre television right now, with Game of Thrones, Person of Interest, Orphan Black, Black Mirror and other shows. But when was the absolute greatest era to be watching science fiction and fantasy on television?

Please include a picture or clip to represent your chosen era. And please mention the years, or rough time period, you're thinking about. And what shows, and general trends, made it so great. Thanks!

Top image: Star Trek: The Original Series and Doctor Who. The heyday of TOS also coincided with one of the best eras on Doctor Who and was a time when television was pushing the envelope in general, with a ton of other great shows.