Fred Olen Ray said he wrote the script in 1984 but put it away thinking no one would want to make it. Then he started showing it around in 1987 and was surprised at all the actors who read it and wanted to be in it.
This was Fred Olen Ray's highest-budgeted production at the time, coming in around $2 million.
In the beginning of the film a woman calls the police station looking for Det. McLemore (Napier). The sergeant at the desk answers the phone identifying himself as "Sgt. Yamotta". Det. Sgt. Yemana was famously played by Jack Soo in Barney Miller (1975-1982) also starring Ron Glass, who is McLemore's partner.
The creature is very similar in appearance to the creature in Alien (1979). It attacks by grabbing onto the mouth of its victim before entering the victim's body. It bursts out of the chest of the victim. When the creature opens its mouth, another extension comes out of the mouth and opens its mouth.
Fred Olen Ray said this was the most effects-laden film he'd made at that point.