Endeavour is a British television detective drama series on ITV. It is a prequel to the long-running Inspector Morse series. Shaun Evans portrays the young Endeavour Morse beginning his career as a detective constable, and later as a detective sergeant, with the Oxford City Police CID. Endeavour is the third of the Inspector Morse series, following the original Inspector Morse (1987–2000) and its spin-off, Lewis (2006–2015).

Nine series were made, set from 1965 to 1972. After a pilot episode broadcast in 2012, set in 1965, the first series was broadcast in 2013, also set in 1965. The second series was set in 1966, while the third and fourth series were both set in 1967. The fifth series, with six episodes, was set in 1968, and the sixth series picked up eight months later, set in 1969. Series seven, set in 1970, began screening in February 2020, with the first episode shown in the United States on Masterpiece Theatre on 9 August that year.

In August 2019, ITV announced that the series had been recommissioned for an eighth series. Filming for series eight, set in 1971, began in March 2021 and concluded in June 2021. Filming for the ninth series, set in 1972, began on 22 May 2022. The next day, it was confirmed that it would be the last. Filming ended on 26 August 2022, and the series was broadcast between 26 February and 12 March 2023. In the United States, the first episode was broadcast on 18 June 2023.