Butler was Professor Whitaker's lab assistant. He helped him operate the Timescoop as part of Operation Golden Age. He also posed as Charles Grover's chauffeur to trick the Doctor into thinking he'd driven Sarah Jane Smith back to UNIT headquarters. When the Doctor broke into Whitaker's base underneath Grover's office, he encountered Butler in the hallway leading to the control room, disabling him and knocking him out with Venusian Aikido.