<P> Gibbs is depicted as having a close (father / daughter - like) relationship with Abby, who is initially one of only two characters (the other one being Ducky) to have no fear of him . Gibbs is often seen giving Abby kisses on the cheek, and hugging her, especially when she does good work on her cases . He often brings her a fresh Caf - Pow when he arrives at the lab for information on a case, whether or not she has called him down to tell him about it . Gibbs generally tolerates Abby's goth dress style, knowing that she does a great job in her work, but often has to ask her to get to the point when she starts rambling . Abby sometimes turns to Gibbs when she needs to talk about something personal that is bothering her and he helps by listening to her . Both Gibbs and Abby are proficient with American Sign Language, as Abby grew up with deaf parents . On several occasions, Abby has been described as "the favorite", a fact that does not escape the rest of the team, but they do not begrudge her for it . </P> <P> Gibbs is also very protective of Abby, especially when she is in very serious danger . For example, in the episode "Bloodbath", she was threatened by a hit man hired by a defendant in a case in which she was testifying, which was also complicated by an ex-boyfriend, Mikel Mawher (guest star, Vincent Young), against whom she had a restraining order, but who then called her in violation of the order . When Gibbs found out about this, he pointedly told Mikel, "The only reason you're still able to walk is because I never heard about you until today!" </P> <P> Sometimes, that protectiveness extends from the rest of the team, as well . For example, in the episode "Spider and the Fly", Alejandro Rivera came to NCIS and began to threaten Abby for not sending in a report about the murder of Pedro Hernandez, Rivera's father, whom Gibbs had killed 20 years previously in revenge for Hernandez killing Gibbs' first wife, Shannon, and young daughter, Kelly . The entire team, including Ducky and Vance, ordered him to leave her alone and to not harass her, or to be escorted forcibly from NCIS Headquarters . Rivera eventually left of his own accord, but was later arrested for attempting to kill Gibbs and his father at a safehouse, and accidentally killing his sister, Paloma . </P> <P> Gibbs' concern for Abby's safety is such that he will even drop his trademark cup of coffee if she is in serious danger . Twice this occurred: in the episode "Kill Ari" when Ari shot at her while she was in her lab, the other time was in the episode "Driven" when she was trapped inside an experimental Humvee, which had been rigged to fill with exhaust fumes and suffocate its occupants . </P>

Who plays abby sciuto's brother on ncis