Supreme Controller ( The Dalek Invasion of Earth ) A Black Dalek known as a Supreme Controller directed the Bedfordshire operation nearing the end of the 22nd century occupation of Earth . The Supreme Controller , was on board the Dalek flying saucer ; saucer alpha - major , along with the Dalek Saucer Commander . It had a terrifying pet called the Slyther which it used to let roam free around the mines at night , killing those it found . The Supreme Controller was killed when the Dalek bomb detonated as Ian Chesterton had sabotaged the bomb . The Supreme Controller ' s voice was considerably higher than those of the other Daleks . ( TV : " The Dalek Invasion of Earth " ) History . The Supreme Commander , was most likely in command of the attacking force on Earth , and oversaw the construction of Bedfordshire , into a gigantic mining area . The Supreme Controller had also seen the making , and selection of his robomen slaves , and slave workers . The Dalek Invasion of Earth . During one of the daily saucer landings to collect more slave workers , and new robomen . Among the prisoners taken was the Doctor , Ian Chesterton , and Larry Madison , a intelligence test by the saucer commander had the doctor convert into a roboman . However that night an attack by the Human resistance was carried out , and the prisoners escaped . After a group of the rebels killed on the daleks , the supreme controller exterminated any humans he saw . After the attack had been defeated , the supreme controller ordered that all humans involved in the attack to be destroyed , however he was unaware the Ian was hiding under the shafts directly under him . When the saucer had a sufficient number of prisoners taken for slave work , the supreme controller had the robomen have fire bombs placed around the city . As the saucer , left for Bedforshire , a can stolen from the musem , had gone on to escape London , attacking patrol 5 , the supreme controller has an immediate attack on the van , and destroys only just failing to kill the rebel passengers . After landing in Bedfordshire , the supreme controller was the first to depart , and arrive in the control room to observe the final stages of the operation . When Susan Foreman , and Jenny are brought before the supreme controller , they discover that the Daleks are drilling through the Earth ' s crust so that they can blow out its core with a penetrative explosive capsule and then use a guidance system to pilot the planet around space . As the Daleks set the capsule in position and start the countdown , Ian , who had got stuck inside , had scrambled the wiring inside the capsule , disarming it . The supreme controller had the capsule brought back up , but as it brought back up , a Dalek observing it ' s lifting saw Ian departing from it , after awaiting orders the supreme ordered Ian to to be exterminated . However the Dalek only shot at the rope , believing Ian would die from the fall . While the capsule was being re - armed , Barbara creates a diversion spinning a wild story about an uprising involving " the Boston Tea Party , " " General Lee ' s forces " and " Hannibal attacking from the Alps , " , which cause the supreme controller , to ask his aides , why he wasn ' t informed of this . Jenny tries to cause cause damage to the controls , while Barbra tried to use the device which controls the Robomen and send them new orders , that couldn ' t be count - maned . However the controller quickly realising they are lying had them immobilised , and chained them , to ensure no more delays . With the capsule re - armed , and ready , the controller personally set the capsule down towards its target , however he was unaware it had been jammed by a cord of wood across the shaft opening , preventing a re - armed explosive capsule from moving further down the shaft . As the count down was going on , the controller had Barbra , and Jenny left alone to die in the explosion . As the controller , and his aides left the doctor , and Carl Tyler had entered the control room releasing Jenny , and Barbra . However the doctor , accidently sets an alarm to the controller who orders two of his aides to exterminate them . Fortunately for the doctor , David and Susan destroy the radio beacon , leaving the Robomen adrift and causing a temporary overload within the Daleks , who short circuit . Barbara and the Doctor give new orders to the Robomen to destroy the Daleks , and with the help of the Robomen , Wells and Tyler lead the human slaves in rebellion , destroying any inert Daleks in their way , and escaping the mine . The bomb explodes , and destroys the Dalek fleet and causes an entirely new phenomenon — a volcanic eruption in England . The controller , was either killed , by the robomen , the slaves , or the explosion of Bedfordshire . Personality . The Dalek controller , has been shown to be patient , short tempered , aggressive , quick thinking , and intelligent . The controller , had also been shown to underestimate the humans , as with attack on the saucer , and with Ian sabotaging the capsule , twice , and with the doctor , and Tyler entering the control room . Behind the scenes . In the " Daleks ' Invasion Earth 2150 A . D . " , the Supreme Controller ' s role was replaced by two Daleks .