The query likely refers to a feature-style summary or analysis of , titled "Oathkeeper" , which famously introduced the Night King . Feature: The Debut of the Night King in "Oathkeeper"
: Directed by Michelle MacLaren, the episode is frequently cited by fans and critics as one of the series' most "intriguing" for its departure from the source material and its peek into the supernatural mechanics of the North. Quick Look: S4E4 "The Night Game" (Alternative Matches) [S4E4] The Night Game
: This was the first time viewers saw the "Night King" character, portrayed at the time by Richard Brake. It also confirmed that the White Walkers increase their numbers by transforming human infants. The query likely refers to a feature-style summary
: Titled "The Night Shift" , it features a crossover with New Girl as Jake enlists Jess Day’s help on a case. It also confirmed that the White Walkers increase
The episode's climax occurs in the Land of Always Winter. A White Walker brings the last of Craster’s infant sons to a ritual site where a mysterious figure with a crown of icy horns—later confirmed as the Night King —touches the child, turning his eyes blue.
While "Oathkeeper" is the most prominent "Night" episode for S4E4, other series have similar themes for this specific slot: