When an astronaut, training for a trip to Mars, is mysteriously killed inside a Mars simulation, Castle and Beckett don spacesuits to investigate. But when they discover no one inside the sealed simulation could have committed the murder and no one f... (more)rom the outside could get in, the case takes a shocking turn

Assaf Cohen, David Clayton Rogers, David DeSantos, Dilshad Vadsaria, Gwendoline Yeo, Konstantin Lavysh, Matthew Marsden, Maxwell Caulfield, Sterling K. Brown