- "My breakfast burrito is about to say hello!"
- —Fornell after discovering that his ex-wife is an IRS agent in the Season 10 episode, "Devil's Trifecta".
Tobias C. Fornell or "T.C" is an FBI Special Agent who occasionally collaborates with the NCIS team on certain cases. Though Fornell and NCIS Special Agent Leroy Jethro Gibbs make it look like they openly loathe working with each other, they have a personal understanding.
Fornell made his debut appearance in the NCIS Season 1 premiere episode, Yankee White (episode) where he attempted to take the lead in the investigation into the circumstances surrounding Commander Ray Trapp's death. He failed to do so and was later kicked off Air Force One by Special Agent Anthony DiNozzo much to Fornell's own annoyance.
However, Fornell was later brought into the investigation and as such, was given copies of the findings that Forensic Scientist Abigail Sciuto and Medical Examiner Donald Mallard had discovered and after Leroy Jethro Gibbs had taken down the terrorist responsible for killing both Trapp and Major Timothy Kerry, Fornell was seen giving a press conference where he discussed the case and also revealed that the terrorist's body would be removed to the Armed Forces Institute of Pathology.
Fornell's second appearance came in Seadog (episode) where he took at former Secret Service-turned-NCIS Special Agent Caitlin Todd by remarking that she'd joined "the cowboys"- NCIS. He even personally came to NCIS Headquarters to inform Gibbs and Kate that one of the persons of interest they were searching for into the death of a a Navy Commander was actually a terrorist, not a drug dealer as NCIS had originally thought. He later ordered security to be tightened after discovering that the terrorists were planning an attack and left, only for Gibbs to state that he believed that Fornell had target fixation, meaning that Fornell was so fixated on strengthening the security of potential targets he was failing to see the bigger picture.
His third appearance came in the episode, Enigma (episode) where he attempted to arrest Gibbs's former C.O, having believed that the man was responsible for the death of an agent under Fornell but Gibbs was successful in proving that Ryan was innocent and that the true killer was caught.
His fourth appearance came in the Season 1 finale episode, Reveille (episode) where he grudgingly arranged a meeting between Gibbs and the newly identified terrorist, Ari Haswari who was responsible for the NCIS hostage situation.