It is assumed ( and often implied ) that there are still human parts beneath their suits , meaning they are actually cyborgs , not robots : in The Tenth Planet , a Cyberman tells a group of humans that `` our brains are just like yours '' , although by the time of Attack of the Cybermen , their brains seem to have been replaced with electronics . It is presumed ( and often implied ) that there are still organic components beneath their suits , meaning they are actually cyborgs , not robots : in The Tenth Planet , a Cyberman tells a group of humans that `` our brains are just like yours '' , although by the time of Attack of the Cybermen ( 1985 ) , their brains seem to have been replaced with electronics .