On NCIS Season 13 Episode 14, the team deals with an unorthodox investigation when a diver is murdered and his coworkers must remain in a decompression chamber.

On NCIS Season 13 Episode 13, the team uncovers the resurgence of an international human-trafficking ring while investigating the murder of a seaman.

On NCIS Season 13 Episode 12, Abby’s brother is the main suspect when he goes missing after being the chef on a private plane whose passengers are poisoned.

On NCIS Season 13 Episode 11, Ducky is attacked by someone who claims to have some information about his half-brother who died years before.

On NCIS Season 13 Episode 10, after two Marine siblings are killed in battle, the Secretary of the Navy asks NCIS to help their brother find a bone marrow match.

On NCIS Season 13 Episode 9, a petty officer whose murder case was dismissed on a technicality offers to be court martialed in the hopes of clearing his name.

On NCIS Season 13 Episode 8, DiNozzo meets with his ex-girlfriend, Jeanne Benoit, when insurgents in Sudan attack a group of doctors, including her husband.

On NCIS Season 13 Episode 7, when the team investigates a retired Navy Lieutenant Commander’s death, Ducky has to reveal his membership in a secret society.

On NCIS Season 13 Episode 6, the NCIS team must determine if a serial killer or a copycat is the killer when a petty officer is found murdered.

On NCIS Season 13 Episode 5, Abby is trapped at a pharmaceutical lab with no way to communicate to the outside world after armed men break in and take hostages.