Deceit is a British four-part television drama miniseries, based on the true story of a controversial undercover operation carried out by the Metropolitan Police in 1992. Niamh Algar stars as the undercover police officer, codenamed "Lizzie James", who attempts to entrap a suspect in a murder investigation. It premiered on Channel 4 on 13 August 2021, and all subsequent episodes were made available for streaming on All 4 that same day after broadcast. The series, written by Emilia di Girolamo and produced by Story Films, received critical acclaim.