I too was wondering if the Sylar as watchmaker image was a reference to either Watchmen or the Sandman story about Prez Rickard.

As for Hiro's story, I've been wondering how his time travel powers would work. Apparently he can't change the past...and yet he did. Are we in a new timeline, where the waitress met him for the first time twice? My theory is that perhaps she knew enough not to tell Hiro and Ando when she finally meets them that she had met Hiro before. But then why wouldn't others in the restaurant recognize Hiro?

My head hurts. :-)