All three of these films are absolutely brilliant. My favourite has to be Identity, but Supemecy and Ultimatum are still just as good. No other actor could play the part of Jason Bourne better than Matt Damon, he is one of a kind. Julia Stiles plays Nicky as a small role in the first two films and a large role in the third film, and she was terrific in these films aswell. The trilogy has other great performances from Franka Potente, Joan Allen, Brian Cox, Chris Cooper and many more. Director Doug Limon did an excellent job directing the first film, while Paul Greengrass also did a great job directing the rest of the franchise.
Overall these film are great, and I would recommend this to anyone who likes a good action thriller.