HBO's newest drama may look like a Western at first glance, but it's only a cover. Seeing how the "Hosts" are programmed and the "Guests" that interact with them is fascinating.
2) The X-Files
I loved watching this show with my parents when I was a kid. It also introduced me to "shipping" even though I didn't know it at the time. I waited not so patiently for Mulder and Scully to get together.
3) Space Cases