“Nightmare Radio: The Night Stalker” (** out of four) was a grimy horror psychodrama about a late-night radio-show host (Paula Brasca) who receives a repeated caller who tests the limits of her sanity especially as she begins to realize he’s lurid and deranged and starts stalking her but how can she be sure when she doesn’t know what he looks like? Three directors are credited for this suspense thriller which is made with some flair and twisted style but eventually loses itself in its ozone of unpleasantness. Similar story was told with Robin Williams in 2006’s “The Night Listener.”