sentences: "City of Death" features the Fourth Doctor (Tom Baker) and his companion Romana (Lalla Ward).Set mainly in Paris in 1979, the plot concerns a scheme by an alien, Scaroth (Julian Glover), to steal the "Mona Lisa" to finance experiments in time travel in the hope of averting the accident that killed the remainder of his race four hundred million years previously, which began the existence of life on the planet as well.