: 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.
: 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. [S7E24] Rule Fifty-One
The head of the Reynosa Cartel who targets Gibbs' father in the final scene, setting up a major Season 8 cliffhanger. : After reflecting on his life and past
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 Hernandez's children, Paloma Reynosa and Alejandro Rivera ,