7 premiere, "Truth or Consequences", he kills the terrorists holding his team hostage from an exceptionally long distance and in "South by Southwest" he outshoots a professional hit-man in an approaching helicopter. His knowledge of the Marine Corps and training as a sniper often comes into use, as shown in the episodes "Ravenous", "Vanished" and "Twenty Klicks" where he uses his wilderness tracking skills and marksmanship to aid the investigation and/or get the team out of trouble. Gibbs is a private man of few words who discloses little to nothing about his personal life. He avoids discussing his life or past before he joined NCIS, especially to agents and co-workers under him, which leads to his team members constantly speculating over his private life. Aside from his tendency to use military slang, he rarely mentions or speaks at length about his time in the Marine Corps although he is often referred to as "Gunny" by other Navy and Marine officers, occasionally dons a "USMC" hoodie or T-shirt when off duty and has a replica of the iconic Raising the Flag on Iwo Jima photograph framed and mounted above the fireplace in his home. Gibbs holds service personnel in the armed forces in high esteem and to a higher standard. He becomes particularly indignant when the guilty party is someone in a position of trust and authority, and he has reacted violently on several occasions when apprehending corrupt high-ranking officers who committed crimes for monetary gain. Relationships Family In the season 6 episode "Heartland", Gibbs' frosty relationship with his father Jackson and the backstory behind it is revealed. His father had rarely been mentioned up to that point and Jackson had not known that Gibbs was a "boss" until Gibbs and his team visited Stillwater to investigate a case. By the end of the episode, they make amends and the two have become closer ever since. Through a series of episodes over a few years, it becomes clear that Gibbs killed Pedro Hernandez in revenge for the death of his wife Shannon and his daughter Kelly. In the episode "Borderland" (Season 7, episode 22), an unknown conspirator manipulates events so that Abby ends up investigating the murder as a cold case and finds irrefutable proof that Gibbs is responsible. Hernandez' now-grown children Paloma Reynosa, the head of the Reynosa drug cartel after taking her spouse's place when he was killed, and