In all honesty, I wasn’t a fan of the Bourne Identity movies. If you asked me, I couldn’t tell you the plot to any of them. Just that there were a lot of fight scenes with those quick cuts that felt like it was edited by someone with ADD. That and I could never take Matt Damon seriously as an action star.
That may change, though I doubt it, with The Bourne Legacy, the first film of the franchise without Matt Damon. It stars Jeremy Renner, Rachel Weisz, Joan Allen and Edward Norton. It has everything you loved about the first three movies but quickly forgot ten minutes after watching it.