(CNN) – For years, the show "South Park" has made fun of things usually too controversial to target – religion, in particular. Jews, Catholics, Mormons, Scientologists, Hindus, Buddhists; no one is safe.
In last week's episode, the world's biggest religious figures came together, including the Muslim prophet, Mohammed. To poke fun at censorship guidelines against showing him, Mohammed was first kept inside of a moving truck and then he wore a bear costume.
One extremist Muslim group has responded, warning the show's creators, Trey Parker and Matt Stone, that they will probably end up dead. Does that go too far or is the warning protected by free speech? Our Drew Griffin with the Special Investigations Unit has the report.