Conan Premiere Beats Leno 3.09K Brian Moylan 11/09/10 04:21PM Filed to: Ratings Ratings Conan O'brien Conan Tbs Jay Leno David Letterman Late Night Jon Stewart Stephen Colbert tweet Conan O'Brien's TBS debut grabbed 4.2 million viewers last night, handily besting Leno, Letterman, Stewart, and Colbert.