Cast of Shut In

Naomi Watts plays the character Mary Portman, a psychologist who lives in isolation with her comatose son.

Oliver Platt portrays Dr. Wilson, a colleague and friend of Mary's who tries to help her cope with her personal struggles.

David Cubitt portrays Doug Hart, a local contractor who becomes involved in the mystery surrounding Mary's life.

Jacob Tremblay plays Tom Patterson, a young boy who seeks Mary's help after his parents' death.

Charlie Heaton takes on the role of Stephen Portman, Mary's troubled teenage stepson.

Clémentine Poidatz plays Lucy, a mysterious woman who appears in Mary's life and may hold the key to the dark secrets within.