Author summary from thingswithwings:
T'Challa – King T'Challa of Wakanda, the Black Panther, Guy Who Dresses Up Like a Cat to Fight Crime or Possibly for Other Reasons, Who the Fuck Knows – T'Challa corners Sam during one of their visits to check in on Bucky and says, in a mild voice that should not sound as threatening as it does, "We need to talk."

"We do, huh," Sam says, looking him up and down. He's just a king and a superhero and a genius inventor and possibly the richest man alive, looking way too fine and wearing the hell out of a tailored three-piece suit; Sam can hold his own against this guy.

Duration 02:10:48

Diplomatic incidents happen all the time, but not all of them end in marriage. And not all trips to alien planets involve a mysterious killer. Sam and Steve are having all kinds of new experiences lately.

Bucky accidentally becomes a surrogate brother to half the neighborhood, purely via the power of PBS.