NBC Entertainment President Kevin Reilly announced Thursday at his network’s March development meeting with advertisers that NBC has renewed four shows for next season, while another of its top dramas is set through 2008.

Dramas “The West Wing,” “Las Vegas” and “Crossing Jordan” and the “Friends” spinoff “Joey” have all been picked up for the 2005-06 season, while Thursday night stalwart “ER” is set though the 2007-08 season.