A one-eyed assassin in Julian Bashir's 1960s spy holosuite programme, who takes on the physical form of Miles O'Brien in 2372 after a transporter accident in Our Man Bashir.
Falcon is a holographic character in the fourth-season Deep Space Nine episode Our Man Bashir. He is a hired killer with an eyepatch and an old grudge against Bashir's secret agent persona, and he works for the villain Hippocrates Noah.
After a transporter emergency the patterns of five officers are stored in the holosuite, and Falcon is given the body of O'Brien. He bursts into Bashir's apartment with armed men early in the story and reappears at Noah's mountain base.
Since killing the character would destroy O'Brien's pattern, Bashir cannot simply shoot his way out, which shapes the whole adventure. O'Brien is recovered along with the others once the programme reaches its end.