Stupid Question-- here's the answer

[Donna Halper]

And the Associated Press is now reporting that "The decision to shift 
Leno will leave a gaping hole in NBC's prime-time schedule, at a time 
the network is already struggling. A mix of reality programming, 
"Dateline NBC" and at least two hours of scripted shows will be added 
to fill in the five hours taken up by Leno's prime-time show each week.

Looking ahead to the 2010-11 season, NBC announced seven drama pilots 
under development, including an updated version of "The Rockford 
Files" from "House" executive producer David Shore; "Undercovers," a 
husband-wife spy drama from producer J.J. Abrams ("Lost") and "Prime 
Suspect," based on the BBC series about a female 
detective." 
http://www.boston.com/ae/tv/articles/2010/01/10/nbc_leno_in_prime_time_to_end/