NOW calls David Letterman 's behavior inappropriate in the workplace . Comment: Feminist group urges CBS `` to take action immediately '' CBS producer accused in extortion plot against talk-show host .
NOW calls David Letterman 's behavior inappropriate in the workplace . Letterman on air admitted to sex with employees , apologized to wife . Feminist group urges CBS `` to take action immediately '' CBS producer accused in extortion plot against talk-show host .