Benedict Cumberbatch
(Henry Clark)
Lindsay Duncan
(Ice Queen)
Jim Carter
(The Compere)
Sophie Hunter
(Annabel Blythe-Smith)
Stephen Campbell Moore
(Peter Blythe-Smith)
Anna Andresen
(The Mermaid)
Esmé Bianco
(Mother)
Charity Wakefield
(Grace)
Barbara Flynn
(Mrs. Argyle)
Kevin Howarth
(Jimmy Harrison)