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Toxic is the twenty-first episode of the sixth season of NCIS, and the one hundred thirty-fourth episode overall.
Starring: Mark Harmon (Special Agent Leroy Jethro Gibbs), Michael Weatherly (Special Agent Anthony DiNozzo), Cote de Pablo (Mossad Officer Ziva David), Pauley Perrette (Forensic Scientist Abby Sciuto), Sean Murray (Special Agent Timothy McGee)
Guest Starring: Peter Jason (Marine Sergeant Major Robert King), Christopher Cousins (Jordan Jones), Andrew Borba (Doctor Phillip Heller), Marianne Muellerleile (Hannah Dunstan), Julie Claire (Lois Heller), Daniel Travis (Drew), Mim Drew (Marie)