While investigating a mysterious death on a top-secret naval research ship at sea, the NCIS team comes upon an abandoned ship which contains a deadly secret that may cost them…

Olivia joins forces with the Strike Team to catch a Mexican drug king and his shipment. Meanwhile, Dutch cleans up Billings’ mess, and the death of a woman associated with…

Doggett comes upon an old case that Mulder kept secret from Scully and he follows up the investigation, hoping to find a possible connection to Mulder’s disappearance.