“NCIS” has maintained an impressive casting record, showcasing its unwavering commitment to character integrity even as the series has navigated multiple character exits. With 21 years on television and the highly anticipated 22nd season premiering in October, “NCIS” has solidified its place as one of the longest-running scripted series. This remarkable achievement can be attributed to the show’s dedication to preserving the essence of its characters, even through significant casting changes. The franchise has developed various strategies to handle these fluctuations, all of which are anchored in one steadfast rule: protecting character continuity.
At its core, “NCIS” is a series built on rules and values. The character of Leroy Jethro Gibbs, played by Mark Harmon, famously lived by a set of rules passed down from his late wife, Shannon. In one of the series’ most memorable episodes, “Heartland,” a flashback revealed that Shannon Gibbs had her own code, which became part of the foundation of Gibbs’ principles. This dedication to rules, both on and off the screen, is a significant factor in the show’s success. Gibbs’ Rule #34 states, “There is no such thing as a coincidence,” a sentiment that reflects the show’s meticulous approach to maintaining continuity. Central to this continuity is the show’s most critical rule: never recast a character. This commitment has allowed “NCIS” to thrive, ensuring that its characters remain authentic and consistent, contributing to its enduring success on CBS.