Trivia: When Richie is watching YouTube, the video review he watches talking about "Stab 8" features a cameo from James A. Janisse and his wife Chelsea Rebecca. They are popular YouTubers who run various horror-themed shows on their channel "Dead Meat." As of 2022, they have over 5 million subscribers.
Trivia: This film was originally in development in 2016 with Hugh Grant and Keira Knightley starring, but put on hold after Disney bought 20th Century Fox.
Trivia: Narrating in 1969, Kya said, "How birds sing mostly at dawn because the cool, moist air of morning carries their songs and their meaning much farther." This is no longer the primary view. Some scientific research found their subject sparrows' songs were louder (or just as loud) at noon than during the so-called "Morning Chorus." It appears the "Morning Chorus" might just sound louder because there are fewer other sounds at that time of the morning to drown them out (i.e, it is quieter). (00:37:15)
Trivia: The first film in the franchise to feature a female "Pinhead," as portrayed by actress Jamie Clayton, a trans-woman. Despite some minor backlash online, original Pinhead actor Doug Bradley has spoken out in support of Clayton, noting that the franchise has always been transgressive and unique, and that he loved her performance on the show "Sense8." It should also be noted that the Cenobites in the original book were mostly androgenous, though "Pinhead" was said to have a feminine voice.