Deep Trap (ディープ·トラップ, Dīpu Torappu) is the twenty-first episode of the anime series, Full Metal Panic!
Overcome with guilt over Melissa's condition, Sousuke lashes out at Kaname telling her that she is a burden. Overhearing the conversation, Kurz hits Sousuke telling him that he made Kaname cry and it is men like him that turn into bad husbands. Realizing his mistake, he looks for Kaname to apologize. However, with help from SRT traitors, Gauron takes control of the Tuatha de Danaan AI with a special program, holding Kaname, Tessa, and the command crew hostage.