If there's one thing that keeps helping CBS, it's naval crimes. "NCIS" doesn't seem to be slowing down, what with its three spin-offs

and more than 400 episodes of the main show (via IMDb). The crime procedural got its start as a pilot for the law show "JAG.

Since then, it has become a well-known show in its own right. Characters come and go, but the song stays the same as the show moves into its 20th season.  

The first episode of Season 20 of "NCIS" is an exciting crossover with the sister show "NCIS: Hawai'i." Jane Tennant

and Ernie Malik (Jason Antoon) join the main office, while Alden Parker (Gary Cole), who was framed for murder

and is trying to get away from the FBI, works there. just like any other day at work.

Parker is lucky that two agencies are working on the case, which made all "NCIS" fans say the same thing about the first episode.

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