David Bianculli

Lehrer, who died July 26, wrote numerous satirical songs, including "Pollution" and "The Vatican Rag." In the latter half of his life, he also taught math at Harvard and MIT.

TV critic David Bianculli reviews Dexter: Resurrection.

CBS canceled Stephen Colbert's late night show last week. By not appreciating, defending and nurturing The Late Show Paramount is muzzling its best voices, and diluting its own broadcast future.