When a misstion pilot on a Mars simulator is murdered. Castle, Beckett and Esposito must put on space suits to figure out who is the killer. Tom Ridgewood, a mission pilot is stabbed to death inside the Mars simulation. All of the other participants have GPS trackers embeded under their skin and no one was near Tom when he was murdered. Castle and Beckett must figure out if someone fooled the tracking device, or did someone sneak in to the simulation.
Back home at the loft, Rick and Kate aren't finding much alone time as things have become crowded when Alexis brings over her friends and Martha has her new boyfriend Ben there overnight. Castle decides to call a family meeting but before he can begin, Martha has an announcement to make. She’s doing quite well with her work and she suspects that in the near future their will be new little Castles in the loft so she has decided to move out. Castle actually seems a bit saddened that his mother will be moving out but offers to help her in any way he can.
Watch Castle Season 7 Episode 16 Online right here at TV Fanatic.