What actors and actresses appeared in When the Lights Go Out - 2011?

The film you're asking about is "When the Lights Go Out" from 2012, not 2011. It was directed by David Slade.

Here are the main cast members:

* Teresa Palmer as Sophie

* Gabriel Bateman as Martin

* Billy Burke as Mark

* Holt McCallany as Scott

* Clea DuVall as Maria

* Embeth Davidtz as Susan

* Wendy Crewson as Claire

* Julian McMahon as Peter

* Luke Grimes as Paul

* David Lyons as Officer Davies

This list includes the actors and actresses who had significant roles in the film. There may be other actors with smaller parts who are not included.