NCIS: Naval Criminal Investigative Service

Episode 6.21 : Toxic

NCIS: Naval Criminal Investigative Service Poster

TV Info

Episode Premiere

April 07, 2009





Show Period

2003 - now

Production Company

CBS, Paramount, Belisarius Prod., thinkfilm

Cast and Crew


Tom Wright


Steven D. Binder

Main Cast

Additional Cast

  • Peter Jason
  • Christopher Cousins
  • Andrew Borba
  • Marianne Muellerleile
  • Julie Claire
  • Daniel Travis
  • Mim Drew
  • Felice Heather Monteith
  • John Brantly Cole Jr.
  • Keith Burke
  • Tavis Danz


When Abby is requisitioned by the Army to help with a top secret research project, Gibbs and the team have to make do on a murder investigation with no forensic specialist. They soon discover that Abby was brought on to replace a missing scientist, Phillip Heller, and that her project is linked to NCIS's murder investigation. They learn that the victim, marine private Marco Riggs, was actually hired to kill Heller, but that Heller had fought back and accidentally killed Riggs with a stun gun. The team is then able to track Heller down, and finds out that the DNA project he and Abby had been working not only has the ability to help sick soldiers, but is also an extremely effective as a weapon. It becomes clear that the Army was duped in to creating the project, and that a disgruntled bio-weapons specialist had covertly set the whole operation up in order to create a new weapon which he could then sell to the highest bidder.

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