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Freaks and geeks
Greatest television programme ever. I just want people to watch it because it's seriously seriously amazing and I can't be bothered using the crummy search function to bump an old thread.
So buy it, it's one of the best things I own. I'm pretty sure everyone who has seen it will back me up.
There's a bunch of other stuff I should say about it but my attention is waning and all I wanted to say was that freaks and geeks is pretty essential for life in general.