From Variety:

Adal does a whole lot of dastardly things in this episode, but nothing is creepier than the revelation that he had a sexual encounter with a young Peter Quinn. We learned some seasons ago that Adal found Quinn as a teenager in dire straits and trained him to become a crack CIA assassin. But only at the end of this episode did Quinn, visibly struggling with mental and emotional anguish, confront his one-time mentor about being a “f—-ing dirty old man.”

Adal’s response is nauseating. “We’re all beautiful when we’re young,” followed by: “Fair enough. … For the record, I never forced myself on anyone.”