The outfit Nick Fury wears is exactly the same outfit he is seen wearing in the last scene of Captain America: The Winter Soldier (2014)--sunglasses, a beanie, and a leather jacket, and hoodie instead of his usual eye patch and trench coat.
Samuel L. Jackson and Ruth Negga previously co-starred in Fury (2012). Coincidentally Fury is the surname of Jackson's character in the Marvel universe.
"Beginning of the End" originally aired on ABC on May 13, 2014, and according to Nielsen Media Research, was watched by 5.45 million viewers.