John Mosley is a man trying to locate the Beacon, and willing to do anything to get it. Prior to this, he was wanted for a double homicide in Seattle, WA. Mosley shows up in the home of Colonel Henry Jacobson, with the intent to track down the Beacon. Equipped with an energy gun and a device with which he apparently is able to read Jacobson's mind, he eventually learns the location of the Beacon; Dr. Walter Bishop's lab.