What actors and actresses appeared in Inside NCIS - 2012?

You're likely thinking of the TV series "NCIS: Los Angeles," which premiered in 2009, not "Inside NCIS." "Inside NCIS" is a documentary series that doesn't feature actors.

If you're referring to "NCIS: Los Angeles" in 2012, here are some of the main actors and actresses:

* Chris O'Donnell as Special Agent G. Callen

* LL Cool J as Special Agent Sam Hanna

* Linda Hunt as Henrietta "Hetty" Lange

* Daniela Ruah as Special Agent Kensi Blye

* Eric Christian Olsen as Special Agent Marty Deeks

* Barrett Foa as Eric Beale

* Renee Felice Smith as Nell Jones

Additionally, there were guest stars and recurring characters in that season. To see a full list, you can check the show's episode guide on websites like IMDb or TV Guide.