The Chase is the eighth serial of the second season in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 22 May to 26 June 1965. The story is set on multiple locations including the Mary Celeste, the Empire State Building, and the planet Aridius. The serial marks the last appearance of William Russell and Jacqueline Hill as companions Ian Chesterton and Barbara Wright and the introduction of Peter Purves as new companion Steven Taylor.