His first produced script was the science fiction adventure TV movie Riverworld, based on the novels by Philip Jose Farmer, for Alliance Atlantis and the Sci Fi Channel.

[4] In 2006 he rewrote the supernatural thriller Knowing, directed by Alex Proyas and starring Nicolas Cage, then he adapted John Milton's epic poem Paradise Lost for Legendary Pictures.

[5][6][7] In 2007 he wrote an uncredited draft of the remake of The Day the Earth Stood Still, directed by Scott Derrickson and starring Keanu Reeves, and co-wrote an adaptation of John Christopher's science fiction trilogy The Tripods with Alex Proyas.

[10] In 2008 he wrote, directed, produced and financed his debut feature film, the psychological thriller Exam,[11] which stars Luke Mably,[12] Colin Salmon and Jimi Mistry.

[26] In 2015, Hazeldine began production on the faith-based drama The Shack, based on the bestselling novel by William P. Young and produced by Gil Netter and Brad Cummings for Summit Entertainment.