A fourth character was filmed but then removed in post production to service the story. The character was named Fry and he was Adam's father's close friend.
The germinating seed seen outside on its own at night is the actual seed that Adam is seen planting in the film.
The entire film was shot in the historical Hollywood Tower in Hollywood California, where Talal Al Asmani (director) and his wife Sarah Al Ali (producer) lived during the production.