The film's villain, Doctor Eric Kiviat, is loosely based on Dr. Roy Mackal (University of Chicago; biologist, engineer, teacher and biochemist) and his voyages to Africa in search of the legendary living dinosaurs of the Congo, Mokele-Mbembe. Mackal's 1980 Congo trip with fellow cryptozoologist, James Powell, was a featured segment on an episode of "Arthur C. Clarke's Mysterious World" television series.
Behind the scenes footage and interviews with Sean Young, William Katt, Patrick McGoohan and Julian Fellows was featured on the 1985 Roadshow Home Video videotape of The Terminator (1984) in Australia and New Zealand.
Joel Goldsmith, son of Jerry Goldsmith who scored the film, did source cues (though not credited) for the film. Only portions of the pieces were used. When Intrada Records re-issued the film score on May 14, 2018, along with better tape sources for the score, the full source cues as recorded were included.