Possible Clues:

• The hero of the Trojan War?
• Greek warrior whose only weakness was his ankle?
• Mythological Greek hero
• Mythical hero being cool in rising water
• Greek hero cool in stormy sea
• Experts tour mound containing Greek warrior
• Old hero, cold after falling in sea, returning
• Hero getting cold in water, on the retreat
• Hero fell among stars
• Mythical Greek hero