The secret that reveals Odysseus is that the marriage bed is made from live olive roots. This convinces Penelope.
Eurycleia recognizes Odysseus purely by his scar.Eumaeus and Philoetius recognize Odysseus by his scar after Odysseus reveals who he is. Laertes, Odysseus' father, also recognizes Odysseus by his scar after Odysseus reveals his identity.
Odysseus kills them all...read it on sparknotes.
No, Odysseus has them completely fooled, until he reveals himself after killing Antinous.
He asks him for proof.
To the suitors.
After Odysseus reveals himself to the suitors in Homer's "The Odyssey," they initially express disbelief and shock at his return. They mock him, insult him, and refuse to believe he is who he claims to be. The suitors continue to taunt and threaten Odysseus, unaware of the impending consequences of their actions.
The first person he reveals himself to is his Son.
He reveals himself to his son Telemachus first.
Odysseus reveals himself to his son Telemachus and his faithful swineherd Eumaeus in Homer's epic, the Odyssey.
When Odysseus returns home to Ithaca, the first person he reveals his identity to is his old nurse, Eurycleia. He does this after she recognizes him while washing his feet, and he swears her to secrecy about his return. Eurycleia's recognition marks the beginning of Odysseus's plan to reclaim his household from the suitors.
While in the underworld: Tiresias recognized Odysseus even before he had drank of the blood. Odysseus' mother Anticlea recognized Odysseus after drinking of the blood. Many former warriors recognized Odysseus, in particular Ajax the greater, who still would not forgive Odysseus after death. While disguised as a beggar by Athena: Argos, his faithful hunting dog, recognized Odysseus. Eurycleia, Odysseus' nurse, recognized Odysseus by his scar. Eumaeus and Philotius recognize Odysseus after he reveals himself to them. The suitors recognize Odysseus after he performs the contest's feat and reveals himself. Penelope recognizes Odysseus after revealing himself. Laertes also recognizes Odysseus after revealing himself.
Telemus, son of Eurymus, foretold to Polyphemus that Odysseus would one day blind him.