This was the series 200th episode.
This is a unique episode in that it flips continuously and seamlessly between Pratt on a night shift and Carter on a day shift. At one point it even goes to split screen to show the parallel storylines side by side.
This episode has patients named Bob Halderman and John Dean. Named after 2 main players in Watergate.
The first scene with Carter being woken up is very similar to the very first scene of the series with Dr. Greene.
The title is a line from Bing Crosby's theme song: "When the blue of the night meets the gold of the day..."