Castle (2009)

The Wrong Stuff

Aired Feb 23, 2015 · 9:00 PM ET · 45 min

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 from the outside could get in, the case takes a shocking turn