Henry Bowie is one of Dexter's friends in the Pilot. He's an optimist and sees through a lot of situations with a "things will get better" mindset and sees the best in people.

Anyone around their fifties-sixties and sounds like just a polite, kind and wise old fella can have a shot at this! 

P.S: There does need to have some range because Henry ultimately reveals a recent tragedy in the Pilot that's obviously a little too dark to talk about normally.