Eric Roberts felt this entry (along with part 3) ruined what was once a promising story.
Eric Roberts was going to reprise his role as Alex Grady in a cameo but scheduling conflicts prevented him from doing so.
The toy monkey carried around by Stephanie is the same model used by comedian Nina Conti for her ventriloquist performances.
Despite only being released 3 years after Best of the Best 3, at least 6 years have passed in the story's continuity.