Clancy Brown is in this episode:
But this time as a different character name. He was in Sayids episode under the name Joe Inman. In this episode he plays
Kevin Inman...not sure if it means anything, but who knows.
There can be only one!
EDIT for Spoiler: <font color=" white"> supposedly Kevin Inman is the guy that was in that hatch with desmond a while back, so hes in desmonds flashback </font>