: The episode centers on the fallout from Gibbs' 1991 assassination of Pedro Hernandez , the drug dealer who killed his wife and daughter. Hernandez's children, Paloma Reynosa and Alejandro Rivera , seek vengeance by trying to force Gibbs to work for their cartel or by targeting his loved ones.
Appears in Mexico to aid Gibbs, representing the "old guard" of justice that Gibbs is beginning to question. "NCIS" Rule Fifty-One (TV Episode 2010) - IMDb [S7E24] Rule Fifty-One
: Director Leon Vance takes a hard line against Gibbs’ "lone wolf" tendencies. In a show of distrust (or perhaps protective maneuvering), Vance assigns Tony DiNozzo to lead the investigation in front of the entire team, forcing Gibbs to face his professional and personal isolation. : The episode centers on the fallout from
: After reflecting on his life and past rules, Gibbs sits in his room and writes "Rule #51: Sometimes—You're wrong" on the back of Rule #13 ("Never involve a lawyer"). This symbolizes his realization that his vigilante justice against Hernandez created a cycle of violence that now threatens his father, Jackson Gibbs , and his team. "NCIS" Rule Fifty-One (TV Episode 2010) - IMDb