Nathan Fillion, who moves from the bridge of the spaceship Serenity to the science-fiction horror movie Slither , told SCI FI Wire that the latter will be a return to old-fashioned splatter films. There's stuff blowing up. There's some nasty stuff. There's some sliming, ... There's a lot of prosthetics. We leaned away from the CGI and leaned towards the prosthetics as an homage to the horror movies of yesteryear. Our creatordirector, James Gunn, said it will be the last time he ever does that.