Mahou Shoujo Lyrical Nanoha StrikerS EP24 - Lightning

This episode explains the past about Regius, Zest, with Ginga and Subaru's Mother, and Lutecia's Mother, who were the officers under the command of Zest. Due then appears to assassinate Regius in front of Zest, Zest then destroys her somehow. Erio and Caro manage to overcome Lutecia and Garyū. Fate has troubles fighting her battle, but finally wins because of Erio and Caro's words. The terrorists are finally all captured. The only ones left are Quattro and Yurikago.