There is a thing called CSI Effect. People *expect* ultra fast DNA tests, they expect "scientific evidence" very far from reality. This final chapter brings conclusion to the show. But the new case lacks original ideas, it is just as tired as the worst seasons of the show, and and it manages to inherit all the issues the CSI series had.

Old stars and characters return to a "yet another" important and big scene that can showcase it all, but as the show tries to amaze us with "detective fantasy" it manages to serve us more nonsense and an uninteresting plot.

When we watched the show the tale about individual characters added a bit of spice to this bland soup of scientific nonsense. The characters and how they performed added a lot to the "drama" in this series. But as a "service to old fans" they wanted to add conclusion to the show, and brought back (revived) old characters in an attempt to please most of us. Too bad it meant: We lost continuity.

And events in the team and continuity were one of the key redeeming qualities of the original show.

See more here:
CSI: Immortality (TV Movie 2015) - IMDb