Shiner, Lewis. "Twilight Time"
Divergence: 1961 CE
What if: Aliens secretly invaded in the 1950s, using subliminal TV, drugged food, etc., in an attempt to establish a police state.
Summary: A political prisoner is sent back into 1961 in a time travel project to remove alien influence.
Published: In Isaac Asimov's Science Fiction Magazine, April 1984; Time Travelers from Isaac Asimov's Magazine (ed. Gardner Dozois), Ace 1989 (0441809359); The Edges of Things, WSFA 1991 (0962172529); Short Story Paperback #30, Pulphouse 1991 (1561465305, 1561469173); and Collected Stories, Subterranean 2009 (1596062525BUY)
— Posted on the author's website, Fiction Liberation Front, Aug. 3, 2007.
Original in: English.
Translation: German by Michael Windgassen as "Zeit des Zwielichts", in Hiroshima soll leben! Die schönsten Alternativwelt-Geschichten (ed. Karl Michael Armer), q.v.
Web link: Fiction Liberation Front