Guard Jevon was a Time Lord on an alternative timeline. He served under Commander Andred.
Jevon was sent by Vansell to bring Romana to the Temporal Operations Tower, but he instead brought a version of her from the primary timeline. He later chased Romana, Leela, Narvin and K9 with Andred and, after Leela was stunned, the two carried her to a cell, but Leela caught them off guard and escaped. (AUDIO: Disassembled)