Staaan?! Five episodes are banned from the official South Park Studios because of death threats by followers of Islam, a “religion of peace”. However troublesome, succumbing to threats of violence means that evil prevails… We can't let that happen, Stan.
“Tolerance of intolerance is cowardice.” —Ayaan Hirsi Ali
“The most wasted of all days is one without laughter.” ―Nicolas Chamfort
“If you want to tell people the truth, make them laugh, otherwise they'll kill you.” ―George Bernard Shaw
#1: S5E3 available on SPS? No.
#2: S10E3 available on SPS? No.
#3: S10E4 available on SPS? No.
Extra: S9E4 available on SPS? No.
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“That'll be three-fiddy.” —Loch Ness Monster
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“The videos don't work.” They're probably taken offline. If you want to help keep these episodes available, go to pirateproxy.live and search for: “south park season X” and click on the 
to download the files with Deluge. Right-click on the torrent, go to properties, then files, to only download the censored episodes. In good conscience, watch this South Park episode about piracy, or read some arguments: 1, 2.