Lewis is a British television detective drama produced for ITV, first airing in 2006 (pilot) then 2007 (series 1). It is a spin-off from Inspector Morse and, like that series, it is set in Oxford. Kevin Whately reprises his character Robert "Robbie" Lewis, who was Morse's sergeant in the original series. Lewis has now been promoted to detective inspector and is assisted by DS James Hathaway, portrayed by Laurence Fox, who was promoted to inspector before the eighth series. The series also stars Clare Holman as forensic pathologist Dr. Laura Hobson, likewise reprising her role from Inspector Morse; and, from the eighth series, Angela Griffin as DS Lizzie Maddox.

On 2 November 2015, ITV announced that the show would end after its ninth series, following the decision made by Kevin Whately and Laurence Fox to retire from their roles in the series. Whately announced that the show had gone on long enough, with his character having done many stories between Morse and Lewis after he took on the role 30 years earlier.