Ncis - Season 6 -

The main cast remained consistent, with the notable addition of as a series regular. Portrayed by Leroy Jethro Gibbs Mark Harmon Lead Special Agent Anthony "Tony" DiNozzo Michael Weatherly Senior Special Agent Ziva David Cote de Pablo Mossad Liaison Officer Timothy McGee Sean Murray Junior Special Agent Abby Sciuto Pauley Perrette Forensic Scientist Dr. Donald "Ducky" Mallard David McCallum Medical Examiner Leon Vance Rocky Carroll NCIS Director Notable Guest Stars: Ralph Waite as Jackson Gibbs (Gibbs' father). Michael Nouri as Eli David (Ziva's father/Mossad Director).

More information on the that introduced the Los Angeles spin-off. NCIS - Season 6

The two-part episode "Legend" serves as a backdoor pilot for NCIS: Los Angeles , introducing characters like G. Callen and Sam Hanna. Series Regulars & Key Guest Stars The main cast remained consistent, with the notable