is able to overcome the effects of cyanide by "stimulating the inhibited enzymes into reversal", a process he referred to as going through "detox". In the episode "Cold Blood", the Eleventh Doctor experiences excruciating pain when the Silurian attempts to decontaminate him of surface bacteria. The Doctor states this would kill him, most likely due to the scanners being programmed to "detox" humans and therefore being unaware of what elements the Doctor requires. A Time Lord is able to conceal their Time Lord nature, and become a human, by using the Chameleon Arch – a device that stores their "essence" and memories in an innocuous device such as a fob watch, and replaces them with false counterparts until the object is later re-opened. The process allows them to disguise themselves as humans physiologically and psychologically, meaning they only have one heart and are stripped of non-human powers, and of any memory of having been a Time Lord. This story element was notably featured in Series 3; the Doctor uses it to hide himself from the Family of Blood and becomes a schoolteacher in Edwardian England. His nemesis the Master used it to disguise himself as a human to escape the Time War. The story element is later revisited in the Series 12 episode "Fugitive of the Judoon" when a mysterious, unknown incarnation of the Doctor (played by Jo Martin), is revealed to have been hiding on Earth as a tour guide named “Ruth Clayton” using a Chameleon Arch. Mental powers Time Lords can communicate by telepathy, and can link their minds to share information and enhance their powers. In Castrovalva, the Doctor activates the TARDIS' Zero Room mentally. Additionally, both the Doctor and the Master demonstrate significant hypnotic abilities which may be supplemented by their telepathic abilities. These powers were elaborated upon from 2005. The Eleventh Doctor is seen using this method to query a cat about the goings-on of the flat in "The Lodger". In "A Good Man Goes to War" and "Closing Time" he is apparently able to even understand babies, as well as horses in "A Town Called Mercy". In "The Girl in the Fireplace", the Tenth Doctor reads the mind of Madame de Pompadour—and in the process, to his surprise, she is able to read his mind as well. In Paul Cornell's Virgin New Adventures novel Love and War, the Doctor uses a similar method to