“GHOST SHARK,” (9 p.m., Syfy): A tortured and murdered great white returns from the dead

“GHOST SHARK,” (9 p.m., Syfy): A tortured and murdered great white returns from the dead to wreak spectral vengeance. It can appear anywhere there’s water, so you might want to take your bathroom break before this movie starts.

“Wilfred” (10 p.m., FX): The mangy mutt (Jason Gann) develops a forbidden-love fixation on another animal. So why can’t he just roll over and play dead?