VIDEO: Sneak Peek - Colin Hanks Guests on Tonight's NCIS

On tonight's episode of CBS's NCIS titled 'Double Blind,' a Department of Defense investigator scrutinizes the NCIS team's response to the Bodnar case involving the murder of Ziva's father and Vance's wife.

Meanwhile, the team examines whether a Petty Officer is suffering from paranoia or if his claims of being followed are tied to a matter of national security. The episode airs tonight, Tuesday, May 7 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Colin Hanks ("Dexter") guest stars as Department of Defense IG Investigator Richard Parsons. Get a sneak peek below!

NCIS (Naval Criminal Investigative Service) is more than just an action drama.  With liberal doses of humor, it's a show that focuses on the sometimes complex and always amusing dynamics of a team forced to work together in high-stress situations.  NCIS Special Agent Leroy Jethro Gibbs, a former Marine gunnery sergeant whose skills as an investigator are unmatched, leads this troupe of colorful personalities.  Gibbs, a man of few words, only needs a look to explain it all.