 Andrew Kevin Walker wrote an uncredited draft of the script, some of  it ended up on screen with one major deletion which was a sequence  that ended up being cut from the theatrical cut of the film and a  small sample of it can be seen on the Special Collectors Edition,  as you see Laurence Fishburnes crew being introduced for the first  time on another rescue mission. Director Paul Anderson would go on  to say in the DVD commentary that he regretted deleted the scene,  but it also didnt help the films pace.