Lost in Space, CBS
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I haven't seen too much of this, but it is rather a classic. Anyway, mostly it's just absolutely terrible stuff. Atrocious production values and mostly mind-bogglingly stupid stories, and so forth. But it's also cool and kinda funny and weird and stuff. I guess. Of course there is this family, the Robinsons, who are going off in this new ship the Jupiter 2, to explore space, and they get lost. Because of sabotage by Dr. Smith, who is the best character. He's really kinda funny. Kind of evil, but a sniveling coward. Brilliant, but self-centered and stuff. I dunno. He seems to sort of care about the Robinsons' good-natured young son, Will, who's also quite smart, and likes Dr. Smith despite the man's bad nature. There's also the Robot, who has lots of arguments with Dr. Smith. They insult each other all the time, it's great. Will and the Robot are great friends to each other, while Dr. Smith and the Robot hate each other. Those are the three best characters.

The other Robinsons as well as Major West are all quite boring and superfluous, IMO. Necessary for the stories, of course, but that's just a technicality; it's really about the relationship between Will, Dr. Smith, and the Robot. Although of course we do kinda like Judy. And the younger daughter Penny was a pretty cute kid and probably the fourth-best character on the show. Of course, Will was played by Bill Mumy, who's done plenty of other good work, most notably playing Lennier in Babylon 5. And Jonathan Harris, who played Dr. Smith, also did some other good work, such as playing Freakazoid's second butler, Professor Jones, in Freakazoid....

Not sure what else to say right now, except there was a remake in movie form in the 90s, also called Lost in Space, of course. It wasn't great, but I liked it well enough, I guess. Certainly from a production standpoint, it was far superior to the 60s TV series... But even so, the series is still fun for its camp and/or nostalgia value, and justifiably more beloved than the movie.