7.2

The Tonight Show with Conan O'Brien

2009

5.8

The Rachel Maddow Show

2008

7.2

Conan

2010

7.6

The Tonight Show Starring Johnny Carson

1962

5.9

Late Night with Jimmy Fallon

2009

6.2

Late Night with David Letterman

1982

6.3

Who Wants to Be a Millionaire?

1999

6.9

The Late Late Show with Craig Ferguson

2005

9.5

On Air with Ryan Seacrest

2004

6.8

The Dick Cavett Show

1968

6.1

The Late Show with Stephen Colbert

2015

6.7

Celebrity Juice

2008