TVLine has posted the following about episode 17 "Scared to Death".
Romy Rosemont guest-stars in Episode 17 as Nurse Lockhart, a syrupy sweet caretaker at a mental asylum. What brings the ABC series to such a hospital? Well, when a young woman appears to have literally been scared to death after watching a “haunted” DVD, Kate and Rick delve into one of their creepiest cases yet. In fact, this particular mystery finds Castle fearing his own date with the Reaper, after he accidentally watches the “cursed” video!