Delilah is slated to appear in the first two new episodes for Season 18, bringing actress Margo Harshman back to the show for the first time in a few years. Delilah Fielding McGee is a Department ...

MORE: The best NCIS celebrity guest stars of all time Margo Harshman will appear in the upcoming instalment as Timothy McGee's wife Delilah Fielding. WATCH: NCIS star Pauley Perret's style ...

In season six, Margo Harshman, Ken Lerner, Matt Battaglia and Ryan Cartwright appeared in guest roles alongside special guest stars Buzz Aldrin, LeVar Burton and Howie Mandel. Who played Alex ...