Its a narrative written and read by Ben Browder, tacked onto the end of Continuum following the story of Cameron's trip to the past up until his death. I kind of like the idea of including it, because it has a bit of finality.

Unfortunately, it's apparently impossible to find, because some genius decided to only put it with copies of Continuum bought from iTunes.

I suppose, theoretically, he could see that bit later, though.