Case involving the Irish medium Eileen Garrett, who allegedly solved the mystery of the crash of the British dirigible R-101 using information communicated to her from the spirit world. Garrett claimed to have had a series of premonitions of the disaster, which killed 48 passengers and crew. She sent a warning to the director of civil aviation, Sir Sefton Brancker, but he refused to take it seriously and declared the R-101 to be as 'safe as a house, except for the millionth chance'. She received a message during a séance from a deceased Captain Hinchcliffe, warning his friend, Ernest Johnston, the navigator of the R-101, not to go on the ship's flight because it would crash, but Johnston also did not take the message seriously.

The R-101 lifted off on 4 October 1930 and crashed the next day near Paris. Garrett allegedly knew about the crash before news reached the media. Brancker was one of the victims. A few days after the crash Garrett concluded a séance and, through her control, Uvani, began to receive messages from the dead captain of the R-101, Flight Lieutenant H Carmichael Irwin. The information that was received about the airship was of such a confidential nature that Harry Price, one of the sitters who was investigating Garrett's mediumship, worried about espionage. He sent a copy of the séance transcript to Sir John Simon, chairman of the Court of Inquiry investigating the disaster. The press got involved, as did a number of military officials, including Major Oliver Villiers, a close friend of Brancker.

Lieutenant Irwin allegedly communicated again and was joined by other members of the crew. The spirits claimed that the R-101 had had a gas leak and a number of other problems, which had been ignored by officials who wanted to launch the vessel on time. Major Villiers was convinced Garrett has been communicating with the spirits of the dead crew but Sir John Simon ruled that nothing could be done with the testimony as it would not be accepted in a court of law. Villiers, however, remained convinced that the dead crew wanted the world to know what had really happened, and 25 years later he gave a copy of the séance records to author James Leasor, who went on to write The Millionth Chance: the story of the R-101.