Mae pedair rhan i'r gyfres hon ac mae'n cynnwys yr actor llwyddiannus, Sarah Lancashire (Happy Valley, Last Tango in Paradise), Lucian Msamati (Taboo, Luther), a Lia Williams (The Missing, The Crown).
The four part serial drama stars highly acclaimed actress Sarah Lancashire (Happy Valley, Last Tango in Paradise), Lucian Msamati (Taboo, Luther), and Lia Williams (The Missing, The Crown).