Guest Stars Matt Craven as Secretary of the Navy Clayton Jarvis Sean Harmon as Young Gibbs Darby Stanchfield as Shannon Gibbs John Finn as Marine Commandant Charles T. Ellison Jeananne Goossen as Marine Private Joan Matteson Sofia Pernas as Marine First Lieutenant Gabriela Flores Jaime Ray Newman as Navy Lieutenant Commander Melanie Burke LaMonica Garrett as Marine Captain Craig Quincy Alex Fernandez as Joseph Flores Dylan Bruce as Justin Fanniker Samantha Sloyan as Emily Goodwin Co Starring Wade Harlan as Marine Cadence Leader
