"What Is and What Should Never Be" is the twentieth episode of the paranormal drama television series Supernatural's second season, and was first broadcast on May 3, 2007. Dean Winchester (Jensen Ackles) finds himself in an alternate reality after a confrontation with a djinn. The creature appears to have fulfilled Dean's greatest wish: that his mother had not been killed when he was a child. Dean is happy until it becomes apparent that his previous work as a hunter of supernatural creatures has been undone. He then rejects the alternate reality and attempts to bring himself back. The episode was written by Raelle Tucker, and marked the directorial debut of series creator Eric Kripke. It featured the return of deceased characters Mary Winchester (Samantha Smith) and Jessica Moore (Adrianne Palicki, pictured). Kripke enjoyed expanding upon the character of Mary, who was only briefly depicted in earlier episodes. Despite obtaining low ratings, the episode acquired positive critical reviews, praising Ackles' performance and welcoming the return of Smith and Palicki. Tucker also received a Constellation Award for her work on the episode.

Read more: https://en.wikipedia.org/wiki/What_Is_and_What_Should_Never_Be_(Supernatural)

_______________________________ Today's selected anniversaries:

1791:

The Polish–Lithuanian Constitution of May 3, the oldest codified national constitution in Europe, was adopted by the Great Sejm. https://en.wikipedia.org/wiki/Constitution_of_May_3,_1791

1855:

American adventurer William Walker and a group of mercenaries sailed from San Francisco to conquer Nicaragua. https://en.wikipedia.org/wiki/William_Walker_(filibuster)

1939:

Subhas Chandra Bose formed the All India Forward Bloc of the Indian National Congress in opposition to Gandhi's tactics of nonviolence. https://en.wikipedia.org/wiki/All_India_Forward_Bloc

1942:

Second World War: Japanese forces began invading Tulagi and nearby islands in the Solomon Islands, enabling them to threaten and interdict the supply and communication routes between the United States and Australia and New Zealand. https://en.wikipedia.org/wiki/Invasion_of_Tulagi_(May_1942)

2000:

The sport of geocaching was born when the coordinates of a cache outside Portland, Oregon, US, were posted to a Usenet group. https://en.wikipedia.org/wiki/Geocaching

_____________________________ Wiktionary's word of the day:

treeness: 1. The essence of what it means to be a tree; the qualities that make a tree what it is. 2. (genetics) The suitability of an evolutionary tree for representing the structure of a population; the degree to which a population structure can be accurately described as a tree of descent, with different branches evolving independently after they split. 3. (graph theory) The condition of being a tree; acyclicity and connectedness. https://en.wiktionary.org/wiki/treeness

___________________________ Wikiquote quote of the day:

 It seems that scientists are often attracted to beautiful theories in the way that insects are attracted to flowers — not by logical deduction, but by something like a sense of smell.   --Steven Weinberg https://en.wikiquote.org/wiki/Steven_Weinberg