As well as remarkable creative control, the Baselight grading facilities at Technicolor also provided critical support in the workflow, by giving free access to all the raw footage from the series as well as the VFX shots as they developed. The practicalities of creating eight hours of premium drama in a television timescale meant that grading on specific episodes took place when directors and DoPs were available for supervision. That meant that Jean-Clément Soret could be working on three or four episodes at any one time.

The result is an engaging, enthralling drama that looks ravishing and chilling in turn. This first series is broadcast on BBC1 and HBO in November and December, while the second series is already in production.