NCIS Season 12 will be released on DVD August 18th. Some of the bonus features you can look forward to are: Audio Commentary on select episodes with cast, writers and directors, deleted and extended scenes and different video segments.
Here are a few:

Audio Commentary by Sean Murray, Terrence O’Hara and Christopher J. Waild
Audio Commentary by Rocky Carroll, Jennifer A. Corbett and Mark Horowitz
Audio Commentary by Mark Harmon, Bethany Rooney and Joe Spano
Pre-Flight Jitters: Shooting on Location
Bad to the Bone
Table for Ten
Rocky Carroll: Director
#1 Drama in the World
Inside Season 12
Deleted and Extended Scenes

Here is the cover art: