I'm not sure if you can spoil a show that's sixteen years old, but if you've never seen Freaks and Geeks, you need to watch it immediately-- before you read this sentence, because there are spoilers ahead-- and if you've never watched because you don't want to get so emotionally attached to a show that's only one season long, I can understand that, but it's worth watching for the music alone and if you're afraid it will end with you wanting more, you couldn't be more wrong-- in fact, it's probably better off that the show got cancelled, because the last several episodes are (serendipitously or not) cumulatively one of the best endings to any show ever made (maybe because they didn't know the show was to be cancelled, so there were no expectations) and each character gets the ending they deserve:
1) Ken overcomes his inhibitions about his once hermaphroditic girlfriend;
2) Nick uses his rhythmic abilities and gawkiness to conquer the disco dance floor . . . although he can't defeat a disco-magician;
3) Neal comes to terms with his dad's philandering and his brother and mother's acceptance of this;
4) Bill comes to terms with his mom dating Coach Fredericks;
5) Sam realizes that dating Cindy is far less wonderful than he imagined, and breaks it off;
6) Daniel (played brilliantly by James Franco) plays Advanced D&D with the geeks, turning the high school social on its head;
7) Lindsey ditches the summer academy in Ann Arbor in order to follow the dead in a VW bus with her freak friend Kim . . .
and there is no coming back from this . . . it's like the final two episodes of The Shield (except funny and poignant instead of disturbing and tortured).