 "Unending" attracted approximately 2.2 million viewers on its first American broadcast on the Sci Fi Channel on June 22, 2007, the best performance for "SG-1" since the September 22, 2006 mid-season finale.Writer and producer Joseph Mallozzi acknowledged that some fans were unhappy with the end of the Asgard, the absence of Jack O’Neill and Daniel and Vala getting together.Reviewers were generally satisfied with the conclusion, and some like Bill Keveney of the "USA Today" felt the episode does not stray far from "the series formula – a mix of sci-fi adventure, relationships and humor".