City of Death is a serial from the seventeenth season of the British science fiction television series Doctor Who. It was made by the BBC and first broadcast in four weekly parts between 29 September 1979 and 20 October 1979 on BBC1. It features the Fourth Doctor (Tom Baker) and Romana (Lalla Ward). Set mainly in Paris in 1979, the plot concerns a scheme by an alien, Scaroth, to steal the Mona Lisa to finance experiments in time travel in the hope of averting the accident that marooned him on Earth four hundred million years previously, which also began the existence of life on the planet as well.
The storyline for City of Death was devised by David Fisher but was heavily re-written by script editor Douglas Adams, aided by producer Graham Williams, and was broadcast under the single pseudonym "David Agnew". It was the first Doctor Who serial to film on location outside of the United Kingdom. The fourth episode was watched by over sixteen million viewers, the highest audience ever attained by an episode of Doctor Who.