watch 01:45 The Loop (TV) Do you like this video? Play Sound Roentgen radiation was a type of radiation. It was relatively harmless to Time Lords, as long as it was expelled quickly enough. According to the Tenth Doctor, Gallifreyan children played with Roentgen bricks. (TV: Smith and Jones) Retrieved from "https://tardis.fandom.com/wiki/Roentgen_radiation?oldid=2666843" Categories: Energy and radiation + cat Cancel Save Community content is available under CC-BY-SA unless otherwise noted.