Within the depth-psychology and classical-studies corpus, Patroclos (Patroklos) emerges not merely as a secondary figure of the Iliadic narrative but as a structural and symbolic pivot around which questions of sacrifice, substitution, and heroic identity revolve. Gregory Nagy’s formative work establishes the interpretive ground: Patroklos functions as the therapōn — the ‘ritual substitute’ — of Achilles, a role whose archaic Anatolian etymology (cognate with Hittite tarpaššia-) invests his death with the force of surrogate self-annihilation. In dying, he enacts what Achilles cannot yet enact for himself, and his killing by Hector foreshadows Achilles’ own death outside the Iliad’s frame. Jacques Lacan, reading the Symposium through Plato’s Phaidros, takes up Patroclos as the pivot for a transformation of erotic positions: Achilles, originally the eromenos (beloved), becomes the erastes (lover) precisely through following Patroclos in death — epapothanein rather than huperapothanein — marking a structural reversal of desire under the sign of mourning. These two interpretive traditions — the anthropological-mythological and the psychoanalytic — rarely meet directly in the corpus, yet both converge on Patroclos as the figure whose death discloses what the hero most essentially is. The Iliadic text itself, in Richmond Lattimore’s and the 2023 Homer translations, provides the narrative scaffold; Nagy’s philology renders it archetypal.