Viewers are curious to know who killed Leroy Jethro Gibbs’ family members in the CBS series, NCIS: Origins. The NCIS spin-off chronicles the early years of young Gibbs in the 1990s when he joined as a special agent at NCIS Camp Pendleton office.

In the December 9 episode titled “Vivo o Muerto,” a case of a missing woman ends up answering some burning questions about Leroy Gibbs' past.

Origins fall finale is coming up soon, and it’s a big one for Leroy Jethro Gibbs. NCIS: Origins Season 1, Episode 10, marks the first Christmas since Gibbs lost his wife and daughter. It will likely be a difficult night for Young Gibbs ( Austin Stowell),