The River may fit best in the horror genre
Awesome analysis by Kevin Melrose at Spinoff Online:
It looks like The River won’t just deliver drama or slightly offbeat adventure in its desperate search for a missing wildlife expert/television personality, but honest-to-goodness, edge-of-your-seat horror. That’s a rare thing on network television. Of course, that probably shouldn’t come as a surprise, given some of the names behind the series — in particular, Steven Spielberg and Oren Peli of Paranormal Activity fame.
If the two minute-plus trailer is a good indication, The River could be a gloriously twisted cross between The Crocodile Hunter, Stanley and Livingstone, Heart of Darkness and, I don’t know, Survivor. Oh, please let that turn out to be an accurate assessment …