David Giuntoli as Nick Burckhardt, Russell Hornsby as Hank Green on “Grimm.” (Scott Green/SCOTT GREEN/NBC)

The supernatural/fairy tale detective drama has been solid for the network on Friday nights, with about 5 million viewers tuning last week.

This is the first bit of good news in awhile for NBC’s new shows for the 2011-2012 season. The network has already canceled “The Playboy Club,” “Free Agents,” “Prime Suspect,” and sent “The Firm” to Saturday Night Burn-off Theatre.