Behind Enemy Lines (潜入 エネミーライン Sen'nyu Enemy Line) is Mission 07 of Macross Δ. It first aired on Tokyo MX and BS11 in Japan on May 15, 2016.
Synopsis[]
Walküre and the Delta Flight perform a covert mission to planet Voldor to learn more about the enemy's plans. On the occasion, they explore ancient ruins belonging to the Protoculture Civilization, where they discover the truth behind the Vár Syndrome outbreaks.