The guests arrive at the estate and quickly discover one of their own dead in a pool of water charged by a live wire.
The 11 remaining guests work to solve a fiery murder; a medallion, a note and socks serve as key evidence.
As the 10 remaining guests attempt to solve the latest murder, suspicion and tension among them leads to more alliances and backstabbing.
The killer uses a mountain lion attack to take down the latest victim; the contestants become more strategic and calculating.
The eight remaining guests investigate how the killer used a horse, snake and poisonous flowers on the latest victim.
Following a double murder, the guests come face to face with their doppelgangers as they race to solve the killings and save themselves.
When the lights go out and a chandelier falls from the ceiling, the guests must investigate the latest murder in the dark.
The killer strikes in the hot tub; the guests learn there is a fourth mystery location to investigate.
The four guests go through a game of speed and memory to reveal the winner; special guest appearances.