Samuel Goldwyn Films distributes in the US.
Filmed in mainland Spain and the Canary Islands.
Filming was originally scheduled for March 2010 in Iceland.
Director David Slade (30 Days of Night) was originally set to direct before getting replaced by French helmer Xavier Gens (Frontiere(s)).
Described as an "Antarctic island horror/psychological thriller."
Scripted by Jesus Olmo (28 Weeks Later).
Based on the best-selling Spanish novel with the same name by Albert Sanchez Pinol.