D4 is an EXCELLENT science-fiction/action/horror thriller with a "backstory" that will draw you in immediately! The movie was made on a "shoestring" budget and yet comes across as a "high dollar" Hollywood production. The director used "true life" experiences from months of "horror" caused by his son's diagnosis of epilepsy and the treatment that followed to create an exciting, suspenseful thriller. Casting was "spot on" and all the actors were totally believable. This independent film deserves any and all exposure/recognition it can get. Congratulations to ALL involved! It's a great, entertaining movie with a solid foundation of experience and determination to get the meaning across - and it achieves its goal!