Isaac Newton Sir Isaac Newton ( also called Jeovus Unus Sanctus ) was an English physicist , mathematician , and spy master . Biography . As a child sitting under a tree , Newton saw an angel broken and bleeding in the branches above him . Curious , he touched the angel ' s body , and its fluid black skin engulfed him . Recognising that Newton was far too important to be erased from history , the angel told Newton that its mission was to destroy the Adversary , and Newton gave it permission to use him . He then awoke at the base of the tree with no memory of what had happened . ( PROSE : " Newtons Sleep " ) One of his most famous accomplishments was formulating the theory of gravity . The Fourth Doctor once claimed that he sat in Newton ' s tree dropping apple s onto his head , then explained gravity to him over dinner . ( TV : " The Pirate Planet " ) It later came to light that Newton remained upset about that event , as his nose bled for three days afterward . When the Fifth Doctor and Nyssa were arrested for forgery , Isaac Newton drew a series of interesting conclusions from a series of anachronistic coins that the Doctor accidentally passed . ( AUDIO : " Summer " ) While working at Trinity College , " Jeova Sanctus Unus " attended the Magus ' presentation at Salomon ' s House as a representative of the Royal Society . There , Silver revealed to him the secret of the egg , but Jeova rebuked him and denounced the egg as a tool of the Adversary ; later , Nick Plainsong seduced Jeova as part of his revenge against Nate . ( PROSE : " Newtons Sleep " ) At some point the Doctor took Newton on a trip to planet Practas Seven , but according to the Tenth Doctor , Newton didn ' t take the experience very well and " sat in a corner and whimpered " . ( COMIC : " Final Sacrifice " ) Jeova later became a Master of the Service ; with the help of Nick Plainsong , he intended to enable Nate Silver to become the Master of Masters and use the Service to steer humankind toward becoming a Republic of Heaven ready to join the fight against the Adversary . When Larissa and Aphra Behn encountered Jeova , Larissa recognised what was inside Jeova and attacked with the continuity needle . As Larissa struggled with the babel , time began to unravel , until Nate Silver tore the needle out of Jeova ' s chest . The damage to history caused by Jeova ' s near - erasure was undone by Faction Paradox ' s rituals . ( PROSE : " Newtons Sleep " ) Later references . K9 Mark II quoted explicitly his third law of motion " Action and reaction are equal and opposite " while in E - Space . ( TV : " Warriors ' Gate " ) When the Fourth Doctor quoted his " For every action , there is an equal and opposite reaction " to Romana II , she concluded that Newton invented punt ing . ( TV : " The Five Doctors " , " Shada " ) The Fourth Doctor described it as Newton ' s revenge when two guards were sent flying into a wall after he sabotaged their transport . ( TV : " The Pirate Planet " ) The Eighth Doctor claimed that the 20th century heralded the end of the gentleman scientist , stating that there would be no more Newtons , Galileos or Faradays . ( PROSE : " The Banquo Legacy " ) According to Professor Celeste Rivers , Newton had a strong interest in the paranormal . ( TV : " The Lost Boy " )