Stephanie Mello – Cynthia Summer
Stephanie Mello appeared in the film Co-incidence before joining the cast of NCIS, and she also had a recurring role in the teen drama Growing Pains. Cynthia Sumner, an MTAC Tech who was introduced in the third season of NCIS, was played by Mello. She rose through the ranks to become Director Shepard’s assistant, but her relationship with Gibbs was strained. Mello’s character mysteriously vanished by season 5, and she never explained why she left the show so abruptly. She has since moved on to doing bit parts in other TV shows and is rarely seen.
Catherin Bell – Sarah MacKenzie
Catherine Bell, a British-American actress, dropped out of school in her sophomore year to pursue modeling opportunities in Japan, and when she returned to the United States, she set her sights on becoming an actress. She went on to star in shows like JAG, Law & Order, and Army Wives. Acting as Lieutenant Colonel Sarah MacKenzie paid off for her, as she was able to land even bigger projects. She went on to star in the film The Good Witch, as well as all subsequent films and television shows in the franchise.