you tube is probably the best place to find any episodes or downloading it has got to be the option there are some websites that offer free downloads or you could get torrents which is a free trustworthy downloading system
:)
on youtube.com
I added a link for you to a movie site where you can watch it by streaming:- Look in the Sources and related linkssection.
Your best bet to watch it without downloads is probably YouTube but it will be split up into different parts. Just type in the episode your after. The add "Part 1" at the end. Watch out for fan-made episodes.
I don't know about movies, but you can watch TV episodes on Hulu.
buy movie cds
southparkstudios.com
TVserieshub.com
Tvlinks. :)
the black markit
www.surfthechannel.com has the episodes!!! :-)
Try YouTube or MegaVideo
cartoon network, wrong you can't watch them online or on tv anymore youtube, no normal episodes, all are alternate spoofs veoh megavideo google etc. only two episodes can be found on google video u can on cartoon network fridays(1-2) and mondays(3-4:30)