A press release from Paul Levinson:

The Chronology Protection Case has been released on iTunes with a new, extended ending.

The 40-minute movie by Jay Kensinger, first released in 2002, is an adaptation of Paul Levinson’s novelette “The Chronology Protection Case,” first published in Analog Magazine in September 1995. The novelette was a finalist for the Nebula Award, reprinted five times — including in the currently best-selling Mammoth Book of Time Travel — and made into an Edgar nominated radio play.

Kensinger directed, produced, wrote, and plays the role of Dr. Phil D’Amato in the movie. D’Amato has appeared in two other novelettes by Levinson — “The Copyright Notice Case” and “The Mendelian Lamp Case” — and in three novels by Levinson, The Silk Code, The Consciousness Plague, and The Pixel Eye.

The extended ending in the 2013 release of the movie brings the story forward from 2002 to 2013, and was written by Levinson and Kensinger. The 2002 release was shown at science fiction conventions around the east coast, including ICon and Philcon.

More details about the movie on IMDB.