PUBLICATION HISTORY The Magazine of Fantasy and Science Fiction, March 1964, p.72-78. as: "Intermezzo på Tunnelbanan" in: Häpna, October 1964. [Swedish]. Venture, December 1965 (British edition). as: "Les Mystères du Métro" in: Fiction #140, July 1965. Published by Opta. [French]. Prime Number, July 1970. as: "Zwischenfall in der U-Bahn" in Primzhal [Prime Number]. June 1972. Translated by Norbert Wolfl. [German]. 50 in 50, July 2001.