Treachery, Faith, and the Great River

"Treachery, Faith, and the Great River" (originally without a serial comma) is the 156th episode of the television series Star Trek: Deep Space Nine, the sixth episode of the seventh season. It was first aired the week of November 2, 1998.^[1] The teleplay was written by David Weddle and Bradley Thompson, based on a story by Philip Kim, and directed by Steve Posey. When it was aired on television in November 1998, the episode received Nielsen ratings of 4.8 points corresponding to over 4.7 million viewers.^[2]

Set in the 24th century, the series follows the adventures of the crew of the Starfleet-managed Bajoran space station Deep Space Nine. The later seasons of the series follow a war between the United Federation of Planets and an expansionist empire known as the Dominion, ruled by the shape-shifting Changelings, which has already absorbed the nearby planet of Cardassia. In this episode, a clone of Weyoun, one of the Dominion's genetically engineered Vorta administrators, attempts to defect to the Federation; since the Vorta see the Changelings as gods, Weyoun delivers himself into the custody of DS9's security chief Odo, a renegade Changeling who has rejected the Dominion.

Guest stars include many of Deep Space Nine's recurring cast, including Jeffrey Combs as two clones of Weyoun, Casey Biggs as Cardassian leader Damar, J. G. Hertzler as Klingon General Martok, Aron Eisenberg and Max Grodénchik as Ferengi engineers Nog and Rom, and Salome Jens as a Changeling.^[3]