Synopsis

A tragedy has occurred within the confines of a Mars simulation – an astronaut, preparing for a journey to the red planet, has been found dead. Castle and Beckett are dispatched to the scene, donning their own spacesuits to examine the sealed environment. Yet, their investigation quickly reveals an impossible scenario: the simulation was airtight, and no one could have entered or exited. The implications are chilling, suggesting a far more perplexing truth behind the astronaut's death.