Refusing to believe her story about cave-dwelling monsters, the sole survivor of a spelunking exploration gone horribly wrong is forced to follow the authorities back into the caves where something awaits. Director: Jon Harris Writers: James McCarthy, J Blakeson, James Watkins, Neil Marshall Cast: Michael J. Reynolds, Shauna Macdonald, Jessika Williams, Douglas Hodge, Josh Dallas, Anna Skellern, Gavan O'Herlihy, Krysten Cummings, Doug Ballard