The film’s villain, Max Zorin, was a part originally intended for David Bowie. Bowie declined the role so he could be in Jim Henson’s film “Labyrinth”. The part in the 007 film was then given to Christopher Walken.
One of the many controversies in this film was the including of the race of fallen angels in the film called “Watchers”. Many biblical groups have accused the movie as not being accurate because they’re not in the Bible. But actually, they are.
In Genesis 6:4, it makes a reference to the Watchers calling them Giants or Nephilim (or spawns of the fallen) walking the Earth in those days. Like many stories from the Bible, it is open for interpretation. Admittedly however, their look as rock giants for the movie was purely for artistic license.
The Norwegian (identified as “Lars” in the 2011 prequel) hunting the alien assimilated dog in the beginning of the film says:
“Se til helvete og kom dere vekk. Det er ikke en bikkje, det er en slags ting! Det imiterer en bikkje, det er ikke virkelig! Kom dere vekk, idioter!”
“Get the hell outta there. That’s not a dog, it’s some sort of thing! It’s imitating a dog, it isn’t real! Get away, you idiots!”
In the 1982 film, he’s played by the film’s associate producer, Larry Franco.
In the 2011 prequel, he’s played by Norwegian actor Jørgen Langhelle.