The studio this film was shot in was plagued with cockroaches for several years after this movie had wrapped.
The cockroaches used in this film were plucked off the streets.
Star Lisa Langlois said in an interview that the shoot was a very unpleasant experience, and that they tried to pressure her into doing a nude shower scene even though they weren't supposed to show anything originally. After being tricked into being totally nude for several long scenes in The Man Who Wasn't There (1983), she swore she wouldn't let producers take advantage of her again. "Again, another film where they tried to get me to take my clothes off and I had it in my contract that I would have a bodysuit on. They didn't have one available the day of the shoot, so I thought I would wear gaffer's tape on my breasts for the scene. They said, 'Oh, we keep seeing the tape in the shower.' So I told them they were seeing too much anyway. The producer took me in the trailer and said, 'I heard you're being difficult about doing the nude scene. What's your problem?' I said, 'Look, I don't have an issue with nude scenes. I don't. I did one for John Huston. But they're not treating me fairly because you don't have a bodysuit for me.'"
Shot in twenty-five days.
The pick up truck and the exterminator's house explosions are both stock footage from Humanoids From The Deep; a film almost produced by Concorde Productions.