Detective Chief Inspector Endeavour Morse, GM, is the eponymous fictional character in the series of detective novels by British author Colin Dexter. On television, he appears in the 33-episode drama series Inspector Morse (1987–2000), in which John Thaw played the character, as well as the (2012–) prequel series Endeavour, portrayed by Shaun Evans. The older Morse is a senior CID (Criminal Investigation Department) officer with the Thames Valley Police in Oxford in England and, in the prequel, Morse is a young detective constable rising through the ranks with the Oxford City Police and in later series the Thames Valley Police.