Where can I watch the episodes?

All South Park episodes can be watched (legally) in the official website of the producers (South Park Studios).

The website can be accessed (depending on the region) in the following links:

http://www.southparkstudios.com/

http://www.southparkstudios.co.uk/

http://www.southpark.de/ (in German, but the language can be changed to English)