In the hallucination in the interrogation room at the police station, wasn't that swimming figure wearing the same kind of hoodie that charlie wore in Season One?

And the inmate at the asylum who pointed Charlie out to Hurley didn't actually look where he was pointing. He had his head down and sort of turned away like he was afraid to look. Perhaps he was also there because he was "seeing things."

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charlie98210
"Whoa!" she said. "Cry 'Havoc!' And let loose the dogs of war!"
And, like Banquo's ghost, they just won't go away.