The TV series was actually surprisingly good. I mean yes the violence and language was really toned down, they added the obligatory annoying brat character and the magic hologram was a tad ridiculous for the setting, but other than that it was rather okay. Heck, I don't even see the toning down of violence and language as an issue.
While it was sanitized, it still felt true to the original movie and it's concepts. Plus it did some great work with the characters from what I remember.
Prime Directives though was really awful for all the reasons mentioned.