Margo Harshman plays the role of Delilah Fielding in the NCIS series. She was introduced in season 11 of the series, which is one of the longest-running shows on CBS with 22 seasons on air.

Margo Cathleen Harshman is an American actress known for her role as Tawny Dean on Even Stevens, on The Big Bang Theory as Sheldon Cooper's assistant, Alex Jensen, and as Delilah McGee ...