Breakthrough, we've all heard it by now and it is more than likely related to The Digital Haunt.
It is probably seen through the eyes of a science who has been working on/ finished his final work. "I crack my brittle hands I'm feeling so much older" could be that he is getting old and that this project has taken him a long while. His project could be the creation or the upgrade process of Cassandra.
But something I've been wondering is that perhaps this scientist could be one of the key people? (Cassandra the main one and then it has been thought that there could be more than one person involved.)
To streatch this theory Ima go ahead and say that there might of been some sort of case of stocholme syndrome thrown in.