WARNING: You may wanna read this post with the lights on.
In honor of today being Friday the 13th (scared yet?!?), we've compiled a list of the 13 most terrifying TV shows of the last 25 years (now you're scared, right?!?).
The following gallery covers programs that lasted multiple seasons and some that barely lasted multiple episodes.
They involved aliens... and monsters... and rivers... and zombies... and, yes, some romance. But we all know how frightening affairs of the heart can be, too, don't we?
Click around now and let us know which terrifying TV shows you think we missed: