It's gotta be ray hafner. Doc described him to a T and leaving lisbons hospital bed he whistled on his way out. At the time that stuck with me as creepy but she said he's a good whistler so that's gotta be the reason heller made him whistle. Bob Kirkland could be Rj but I thought it was ray since the end of last season. I think eventually Lisbon will remember him whistling leaving this hospital room. Either way this is gonna be a great season!