NBC orders additional 'Knight Rider' scripts

Good sign for freshman drama

NBC has ordered four additional scripts for "Knight Rider," a positive sign for the freshman drama, which has had a sluggish ratings start.

This is the second new scripted series after CBS' promising crime drama "The Mentalist" to receive an additional script pickup, often a precursor to a full-season order.

For the past couple of years, broadcast networks have been hedging their bets by ordering scripts in lieu of off-the-bat back-nine orders for their new series.

Two freshman series, Fox's "Fringe" and the CW's "90210," have been picked up for a full season.

In its most recent airing Wednesday, "Rider" (6.9 million viewers, 2.3 rating/7 share among adults 18-49) slipped a notch, tying CBS for second place the hour among adults 18-48.