“NCIS” — Season 4
The fourth season of NCIS begins with one of the investigators being charged with assassinating an Iranian prisoner. Former Mossad intelligence agent Ziva David (Cote de Pablo), who was introduced last season, has been framed, and there’s only one man who can clear her name. Unfortunately, lead investigator Jethro Gibbs (Mark Harmon) has retired to Mexico. But since Harmon is the star of the show, Gibbs returns to the United States to help out his colleague.