Anthology series of composed of distinct story episodes, sometimes with a plot twist at the end, with occasional recurring story elements that were often tied together during season-finale clip shows.
It was a little more science fiction and a little less ironic than the Twilight Zone, a little less horror, a little more alien...
... so it kind of felt like it wanted to be the Twilight Zone, but wanted to compete with it too and in the era of the Atomic Bomb with Science Fiction and all things space reigned supreme... it worked.
Not it kind of feels a little like the lesser cousin, but, who cares, it's still a cool anthology and if you are a sci-fi geek, it's pure candy.