• Broadcasting & Cable, Thursday, August 13, 2009 10:21 PM

Repeats of "The Late Show with David Letterman" topped new episodes of "The Tonight Show with Conan O'Brien" in total viewers and households by a slight margin for the week ending August 7, per Nielsen. However, NBC is quick to point out that "The Tonight Show" won by a sizable margin among people 18-49.

Although it targets a different demographic and is not a comedy program, ABC News' "Nightline" beat both the "Late Show" and "Tonight Show" handily among total viewers that week. "Nightline" has been something of a wild card in the equation, drawing excellent total viewership numbers lately, which could be sapping away viewers from one or both of the comedy shows.

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