In the film "Thunderball", credits are somewhat complex. Like a good number of James Bond films, it was promoted as being "Ian Fleming's". The screenplay was credited to Richard Maibaum and John Hopkins. However, it was also credited as having been "based on an original screenplay by Jack Whittingham," which also was credited as being "based on the original story by Kevin McClory, Jack Whittingham, and Ian Fleming". Whittingham's sole original screenplay credit has been omitted from posters and other promotional materials.