What actors and actresses appeared in Sandcastle - 2013?

You're likely thinking of the 2017 film "Sandcastle", not a 2013 film. The cast for the 2017 film "Sandcastle" includes:

* Nicky Whelan as Melanie

* Tom Sizemore as Jack

* Bojana Novakovic as Sarah

* Sean Brosnan as Mark

* William Devane as John

Please note that there may be other films titled "Sandcastle" released in different years. If you're referring to a different film, please provide more details.