The potential was clearly there for something good, but the poor casting really holds this back. What we have instead is a barely adequate action film about two police officers—David Carradine and Richard Rowntree—investigating a killer who brutally severs the heads of his victims, often while they appear secure on rooftops or other high places. Simultaneously, “Quinn” (Michael Moriarty) is attempting to evade those …

This enjoyable monster movie set in a large urban environment centers around Quetzalcoatl. Two New York City detectives, portrayed by David Carradine and Richard Roundtree, find themselves looking into deaths that appear connected to ancient Aztec ceremonies when a massive winged serpent starts attacking people. A piano-playing criminal (Michael Moriarty) says he knows the location of its lair and offers his infor…