His contract as a staff director was not renewed following the completion of his Doctor Who serial .
Imison remained at the BBC and acted as story editor on the second series of Out of the Unknown under producer Irene Shubik .
Although his contract as a staff director was not renewed following the completion of his Doctor Who serial , Imison remained at the BBC and acted as story editor on the second series of Out of the Unknown under producer Irene Shubik .