Fair Winds and Following Seas (S10E22)

In the series finale, Mac and newly promoted Capt. Rabb prepare to depart for new billets in San Diego and London, respectively, and are permitted to choose their staffs from among their colleagues. Meanwhile, Vukovic is asked to investigate the case of an enigmatic Marine recruit (Zach Bostrom) who leaves his barracks at night to supposedly kill “the enemy.” (CBS TV Network)