Ether

World Wireless System was intended to transmit energy through the ether. Nikola Tesla considered 50000 dollars a small price to pay to transmit energy through the ether with no wires. (TV: Nikola Tesla's Night of Terror) According to K9, the psychokinetic energy generated by the Mentiad's psychospore left "considerable disturbance" in the ether. (TV: The Pirate Planet)

"Light ions in the ether" were the means by which the Daleks' Rad-etheric magniscopes were able to "see" at a distance of over a million miles. (PROSE: )

In 2323, Georgette Gold, after recreating the space-time telegraph, sent intelligent code into the ether as a distress call to the Doctor's TARDIS through its time/space signature, hoping to lure the Doctor to help with her PhD in Dalek Studies. This triggered Automated Protocol Epsilon Delta Rho within the TARDIS, sending it and the Fourteenth Doctor to the Dalek Dome. (COMIC: )