The pair will be joined by Nico Mirallegro (The Village), Tallulah Greive (Millie in Between), Art Malik (The Woman in White) and Wanda Ventham (Sherlock) in the three-part drama.
The series, which was unveiled as part of Channel 5’s first major drama slate earlier this year, is written by Mr Selfridge writer Kate O’Riordan.
A psychological thriller that follows the lives of Rosalie, played by Graham, and Luke Douglas, played by Morrissey, and their teenage daughter, Maddie (Greive). Following the loss of their son, Rosalie and Luke find their marriage under immense strain. Maddie and Rosalie find themselves in the caring hands of Nico Mirallegro’s Jed, a charming and charismatic young man that they encounter at bereavement counselling who is also suffering under the weight of his own grief.