[MID-CREDIT SCENE]
[A doctor preps Bucky]
STEVE ROGERS: You sure about this?
BUCKY BARNES: I can't trust my own mind. So, until they figure out how to get this stuff out of my head, I think going back under is the best thing...for everybody.
STEVE ROGERS: Thank you for this.
T'CHALLA: Your friend and my father, they are both victims. If I can help one of them to find peace...
STEVE ROGERS: You know, if they find out he's here, they'll come for him.
T'CHALLA: Let them try.