The series was filmed in two blocks of three episodes. The first three were directed by Douglas Mackinnon and the second three episodes by Matt Lipsey. It took an hour of make-up each day to turn Nesbitt into Hyde; a hairpiece lowered his hairline and prosthetics were added to his chin, nose and ear lobes. He also wore black contact lenses to make Hyde "soulless". After many debates, the producers decided that Hyde's imminent arrival would be indicated by the flash of a black eye. The eye imagery evolved during filming, and did not appear in the script.