User blog comment:Hermione Chase/"The Blood of Olympus" Expectations/@comment-10901795-20131220181837/@comment-4531192-20131220182525

I think you mean Harry Houdini. He was said to have escaped from the Underworld, and it's also said that he could even escape "the depths of the pits of Tartarus." Whether he ever actually did the latter, we don't know for sure.