 Terry Gilliam (qv), Tony Grisoni (I) (qv), Alex Cox (I) (qv),  and Tod Davies (qv) are credited for the films screenplay.  Gilliam and Grisoni adapted the novel by Hunter S. Thompson (qv)  and used their script for the film; however, a nasty arbitration  wrangle at the Writers Guild of America found that Cox and Davies  had written a screenplay earlier that had also adapted Thompsons  novel, and should thus receive credit for the finished work even  though they had nothing to do with it.