Question: What American-Canadian conservative political commentator, actor, and comedian that played the voice of Brain, in the 6th season of the television show "Arthur", originally broadcast on PBS?
Sentence (from "Arthur (season 6)"): The 6th season of the television series "Arthur" was originally broadcast on PBS in the United States on September 24 to November 26, 2001 and contains 10 episodes.
Relevant evidence: Yes