I’d mostly forgotten about sgt blunt asshole, designed to be the voice of skepticism and assholishness on every ep he was there (except, I think that one latter season ep where he was now a security consultant on Earth, I think he was more relaxed there)

Dean Marshall

Dean Marshall, the former Sgt. Bates on Atlantis has a quick appearance on Arrow.

Today’s Stargate Alum is Dean Marshall (aka Sgt. Bates on SGA) here playing a much more likeable character