With The Bourne Ultimatum set for release, it was predictable there would be new DVDs exploring the first two movies in the popular series.

Some of these franchise re-releases can be a cash grab.

So it was gratifying to discover that The Bourne Files, a three-disc set out this week in widescreen-only, is a good addition to the Bourne lore. The packaging -- a file case -- is also fresh.

The movies, The Bourne Identity and The Bourne Supremacy, are offered in their original theatrical edits.

The third disc has new bonus materials. But, if you already own the first two movies (including the extended edition of Identity) then these extras are not weighty enough to justify a new purchase.

Two of the three docs are 13-minute takes on the late novelist Robert Ludlum, who (in a vintage interview) describes how he loathes "the age of fanaticism" and wrote in response to that. The third doc is a 24-minute examination of how director Doug Limon, whom Ludlum nicknamed Hollywood, came to work in a unique collaboration to turn Identity into a superior espionage thriller.

Paul Greengrass' Supremacy then maintained the benchmark quality of the original. Now it is up to Ultimatum -- previewed in a routine trailer on the bonus disc -- to cap off the trilogy.