Achilles

Achilles was a Greek warrior who fought in the Trojan War. The First Doctor accidentally helped him slay Hector, the son of King Priam of Troy. Having seen the Doctor emerge from the TARDIS, he came to believe that he was the Greek god Zeus, who had taken human form and descended to Earth. Odysseus, the King of Ithaca, was considerably more sceptical.

He was later killed in battle by Hector's younger brother Troilus. (DW: The Myth Makers)