 To help justify the films being set in the future, the art  department added two fake elements to the periodic table in the  scientists interview scenes: "Mf" for Marta Ficke (qv), the  production designer, and "Jk" for Jake Cohen (qv), the Director of  Photography. There was also a "Sl" for Sara Lesin (qv), the  producer, but this is matted out of most copies of the film for  projection.