For season 3, Adult Swim had the episodes streaming online about two days in advance. For "The Family that Slays Together Stays Together Part 1" this was included as an "extra" cold opening in addition to the one that's there. There was also reportedly some discussion that it might air as a teaser during commercial breaks on Adult Swim leading up to the premiere, but ultimately it became a streaming thing that was temporarily lost when Doc and Jackson forgot to put it on the season 3 DVD (although it wound up on the next set). (thetvdb.com)