The dynamic team is out to foil a plot that could lead to the end of privacy worldwide and then, as if such a grandiose premise wasn't enough, they must fight for their own survival as a string of betrayals that not even Benedict Arnold could hatch unfolds. Actually, there are several instances in the movie, starting with the opening scene, where Cruise or another character turns out to be someone else with a rubber mask and taped-on voice chip.
Bond is never behind any of the rubber disguises though.