 In "City of Death",<ref></ref> both the Fourth Doctor and Romana notice distortions and jumps in time that no one else does.In the 2010 episode "The Lodger", the Eleventh Doctor is the only one to notice (and remain free of) the time loops caused by the activation of the Time Engine.In the 2005 series, the Ninth Doctor claims that he can sense the movement of the Earth through space<ref name="rose"></ref> as well as being able to perceive the past and all possible futures.<ref name = "potw"></ref> He is also able to concentrate and time his motions well enough to step safely through the blades of a rapidly spinning fan, and later claims that if any Time Lords still existed, he would be able to sense them.