 Val Kilmer (qv) was originally cast as the films lead but wanted  his commitment to the project reduced after being served divorce  papers by his then wife Joanne Whalley (qv). This lead to him  switching roles with Rob Morrow (qv), originally cast as  Montgomery, the Doctors assistant. Morrow left the film after  director Richard Stanley (I) (qv) was fired, leading to  David Thewlis (qv) being cast.