First appearance of the Risa pleasure-planet, mentioned also in "The Mind's Eye" and "The Game" as well as numerous episodes in spinoff Deep Space Nine and Enterprise ("Let He Who is Without Sin", "Two Days and Two Nights".)
	Picard was a mediator between the Gemarians and the Dachlyds on Gemaris V during their trade dispute. The mediation lasted two weeks.
	The Astrophysics Center on Icor Nine is holding a symposium on rogue star clusters.
	The Vorgans are time travellers from the 27th Century.
	The Sarthongians of Sarthong V are harsh with trespassers. The planet has a large collection of ancient ruins.
	First appearance of Vash.
	Picard spent four days holiday on Zytchin III. He lied to Dr. Crusher that he enjoyed the trip.
	Picard's light reading on Risa includes "Ulysses" by Joyce and "Ethics, Sophistry and the Alternate Universe" by Ving Kuda.
	Hoverball is played on Risa.
	The Horga'hn is a symbol of Risian sexuality. To display it openly shows you seek Jamaharon.
	The Tox Uthat is a mythical archaeological relic. In reality it is a 27th century quantum phase inhibitor invested by scientist Kal Dano and capable of halting all nuclear reaction within a star. It was brought to the 22nd century to prevent Vorgon criminals stealing it.
	Vash spent 5 years as personal assistant to Professor Samuel Estragon who spent half his life searching for the Tox Uthat.
	Vash planned to sell the Uthat at the Daystrom Institute.

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