Hide and Seek

In an alternate universe, Rebecca Horne never died; in 2014 she lives at the Naval Academy, as a history professor. Her world is turned upside down when someone starts beheading both Immortals and mortals. NCIS comes to investigate, reuniting her with Leroy Jethro Gibbs. All the evidence points to Rebecca. Only Methos working with Gibbs' team, can save her & find the real killer