Soldier who served under Colonel Jack O'Neill on the first mission to Abydos after the Stargate was first activated. He remained with half the team back at the pyramid when O'Neill led the others to the Abydonian city of Nagada.
Porro, Freeman, Reilly, and Louis Ferretti sought refuge inside the pyramid when their position was overtaken by a massive sand storm. When Ra's pyramid ship arrived above them they were attacked by his guards.
It is likely that Reilly was killed inside the pyramid, as he does not seen in the prison pit with the other team members.
"Stargate" the Movie - Porro joins the first team through the Stargate, but likely does not survive the encounter with the forces of the powerful Ra.