Join or Sign In
Sign in to customize your TV listings
By joining TV Guide, you agree to our Terms of Use and acknowledge the data practices in our Privacy Policy.
A crazed scientist attempts to transplant a young girl's brain into the body of an ape.
There are no TV Airings of Castle Sinister in the next 14 days.
Add Castle Sinister to your Watchlist to find out when it's coming back.
Check if it is available to stream online via "Where to Watch".