Murphy's performance is a triumph, pitching with precision from one emotional extreme to another.
Cillian Murphy and writer Enda Walsh's collaborations on stage tend to lean towards the surreal and avant-garde and Grief Is The Thing With Features is no exception.
Based on the award-winning novel by Max Porter, a man (Murphy) is holed-up in his London flat grieving the loss of his wife and the mother of his two sons.
The cacophony of different emotions he and his family is feeling invites a visit by Crow, a destructive, tricky character who threatens to stay until the father and sons no longer need him.
While crows traditionally represent death and tragedy in literature, here the creature is also a cathartic vehicle through which the family can express those deeper, raw emotions and ultimately learn to survive their grief.
Walsh has chosen to have Murphy play Crow as well as the father.