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August 1 is a 1988 Indian Malayalam language action thriller spy film directed by Sibi Malayil, written by S. N. Swamy, starring Mammootty, Sukumaran and Captain Raju. The film was produced and distributed by M. Mani under the banner of Sunitha Productions. 1 August? is loosely based on the 1971 British novel The Day of the Jackal, by Frederick Forsyth which had inspired a film of the same name. The film was a commercial success and is considered one of the best investigative thrillers in Malayalam cinema.