NCIS: Origins

Gibbs and Franks investigate the disappearance of a young Marine connected to a mysterious compound with a charismatic leader.

When the body of a college swimmer washes up on the beach, the team must determine if it was an accident or murder. Also, Gibbs prepares for his first interrogation.

When Dr. Donald "Ducky" Mallard, a liaison from D.C. headquarters and an old acquaintance of Gibbs, arrives to evaluate whether Pendleton needs an in-house medical examiner.

Tensions rise when Franks' estranged older brother, Mason, blows into town, desperate for help after hitting rock bottom.

When a naval officer mysteriously dies in the '90s, Gibbs and the team travel to Serenity, Calif., where they encounter an investigation that will reverberate for decades.

When an anonymous tip leads to the discovery of a Marine's body at a crime scene, Randy believes it could be connected to a previous case where a coin was left in the victim's throat.

The team investigates the murder of a Marine who had recently been handpicked for a classified mission.

When Lala's favorite CI is shot, the team joins forces with Oceanside PD to determine who was behind the attack. Also, Franks visits his brother Mason at the compound.

As the team discovers Gibbs' drunken Vegas elopement with Diane, the newlyweds contemplate their future while investigating a fatal movie theater bombing.

When a Marine captain shows up at Camp Pendleton exhibiting symptoms of a fatal virus, NIS goes on lockdown and Gibbs is forced to take charge.

When a lieutenant's water-logged body is discovered with a potential connection to an international smuggling ring, NIS Panama agents are called in to assist.

When the NIS Regional Director tries to transfer Mary Jo, she reconnects with an old friend from Atlantic City to help investigate the roadside deaths of two Marines.

When Dr. Tango (Julian Black Antelope) is arrested for stealing human remains from a national park, Dr. Donald "Ducky" Mallard (Adam Campbell) returns to assist the team in proving his innocence.

When the team's trusted K-9 agent, Gary Callahan, is critically wounded at a crime scene, NIS races to track down the culprit while a surprising pre-Pendleton chapter in Franks' life is revealed.