When a series of murders in the run up to Christmas are found to be linked, FBI Special Agent Natalie Parker is tasked with tracking a pair of psychotic serial killers that have based their personas on Santa and Mrs Claus. As Christmas approaches, they slaughter their way through their naughty list, playing a cat and mouse game with the FBI and leaving a trail of bloody bodies in their wake.

The crew of USS Titan find themselves on the brink of World War 3 with Russia, when a naked stowaway appears in one of their torpedo tubes. The captain banks fears she may be Russian, but she's something far more dangerous.

When researchers rescue a fellow scientist who survived a meteorite strike in the Arctic, they discover she may not be who they think she is. Is she some-how changed?