While “NCIS” boasts a star-studded cast that has captured the hearts of millions of viewers worldwide, there are some lesser-known actors who made memorable appearances on the hit TV series, flying under the radar of many fans. These talented individuals may not have achieved household name status, but their contributions to “NCIS” have left a lasting impact on the show’s narrative.

One such actor is Sterling K. Brown, who made a brief but unforgettable appearance in the second season of “NCIS” as Edward Triff, a Navy lieutenant accused of murder. Brown’s performance showcased his dramatic range and foreshadowed the illustrious career that would follow, including Emmy-winning roles in shows like “This Is Us.” Another hidden gem is Lily Tomlin, who guest-starred in a season 10 episode of “NCIS” as Penelope Langston, a quirky grandmother caught up in a murder investigation. Tomlin’s comedic prowess added a unique charm to the episode, proving that even established stars are drawn to the intrigue of “NCIS.”