No smiling allowed

The same way we always get a rival assassin, we always have a grizzled authority figure and nobody embodies that character more than Tommy Lee Jones, the walking manifestation of the word “gruff.” Here, he’s CIA Director Robert Dewey, who seems very pro-Jason Bourne (pre-Jason Bourne becoming all nah-Jason Bourne).
“I volunteered because of a lie” is what we’re told about Bourne’s motivation, indicating there’s more to be uncovered about his transformation into Treadstone assassin. Makes sense considering Nicky’s helpful delineation between “remembering” and “knowing.”