Mark Shaw

David Cubitt portrays Mark Shaw on Arrow. In the third season episode "Corto Maltese", he is the liaison A.R.G.U.S. agent to Corto Maltese, who has gone off the grid and is unreachable. Lyla Michaels asks John Diggle to check-up on Shaw while he visits the island. Diggle finds Shaw who is in the midst of a critical undercover mission with a local cartel. Diggle offers to help. Soon after, Shaw betrays him and steals an A.R.G.U.S. thumbdrive. Oliver Queen, Roy Harper and Diggle ambush the trade between Shaw and the cartel. After Diggle defeats him, Shaw claims Amanda Waller drove him to his insubordination.