Shearer was born December 23, 1943 in Los Angeles, the son of Dora Warren (nee Kohn; d. 2008), a bookkeeper, and Mack Shearer. His parents were Jewish emigrants from Austria and Poland. Starting when Shearer was four years old, he had a piano teacher whose daughter worked as a child actress. The piano teacher later decided to make a career change and become a children's agent, as she knew people in the business through her daughter's work.
Since 1983, Shearer has been the host of the public radio comedy/music program Le Show. The program is a hodgepodge of satirical news commentary, music, and sketch comedy that takes aim at the "mega morons of the mighty media". It is carried on many National Public Radio and other public radio stations throughout the United States. Since the merger of SIRIUS and XM satellite radio services the program is no longer available on either. The show has also been made available as a podcast on iTunes and by WWNO. On the weekly program Shearer alternates between DJing, reading and commenting on the news of the day after the manner of Mort Sahl, and performing original (mostly political) comedy sketches and songs. In 2008, Shearer released a music CD called Songs of the Bushmen, consisting of his satirical numbers about former President George W. Bush on Le Show. Shearer says he criticizes both Republicans and Democrats equally, and also says that "the iron law of doing comedy about politics is you make fun of whoever is running the place" and that "everyone else is just running around talking. They are the ones who are actually doing something, changing people's lives for better or for worse. Other people the media calls 'satirists' don't work that way." Since encountering satellite news feeds when he worked on Saturday Night Live, Shearer has been fascinated with the contents of the video that does not air. Shearer refers to these clips as found objects. "I thought, wow, there is just an unending supply of this material, and it's wonderful and fascinating and funny and sometimes haunting - but it's always good," said Shearer. He collects this material and uses it on Le Show and on his website. In 2008, he assembled video clips of newsmakers from this collection into an art installation titled "The Silent Echo Chamber" which was exhibited at The Aldrich Contemporary Art Museum in Ridgefield, Connecticut. The exhibit was also displayed in 2009 at Institut Valencia d'Art Modern (IVAM) in Valencia, Spain and in 2010 at the New Orleans Contemporary Arts Center. In 2006 Shearer appeared with Brian Hayes in four episodes of the BBC Radio 4 sitcom Not Today, Thank You, playing Nostrils, a man so ugly he cannot stand to be in his own presence. He was originally scheduled to appear in all six episodes but had to withdraw from recording two due to a problem with his work permit. On June 19, 2008, it was announced that Shearer would receive a star on the Hollywood Walk of Fame in the radio category. The date of the ceremony where his star will be put in place has yet to be announced.

Q: What was Le Show?
A: The program is a hodgepodge of satirical news commentary, music, and sketch comedy that takes aim at the "mega morons of the mighty media

Q: How long did it run?
A: unknown
When did he start Le Show?
Since 1983, 2008, Since 1983, Since 1983, Shearer has been the host of the public radio comedy/music program Le Show.
Since 1983, Shearer has been the host of the public radio comedy/music program Le Show.