So what do you think they are all listening to locked away in a creepy basement with the lights low? We're guessing that Castle and Beckett are there to find out.
Rick enlists Kate's help when he witnesses his client's murder but has no evidence to prove her husband was the killer on Castle. "I, Witness" is the 13th episode of the show's seventh season.
Castle and Beckett don spacesuits and enter a Mars simulation to figure out how an astronaut ended up dead on Castle. "The Wrong Stuff" is the 16th episode of the show's seventh season.