Cautionary Tale: The Science of I Am Legend interviews some of the cast and scientists about the realities of the film, and the overall possibilities of the scenario actually happening. This runs 20 minutes. Four animated comics round off the extras. 
This Blu-ray contains both the theatrical and extended cut. The new ending on the latter doesn’t bail itself out with a massive explosion to please the audience. It takes an emotional approach that works for the film instead of against it. This is a far better climax, and that makes this worth a rental (at the least) to see the new final chapter.
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![I Am Legend (Combo HD DVD and Standard DVD) [HD DVD]](http://ecx.images-amazon.com/images/I/51ia1wYzFBL._SL120_.jpg)
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