"By Inferno's Light" is the 113th episode of the television series Star Trek: Deep Space Nine, the 15th episode of the fifth season. Set in the 24th century, the series follows the adventures of the crew of the Starfleet-run space station Deep Space Nine near the planet Bajor, guarding a wormhole that connects the Alpha and Gamma Quadrants of the galaxy, as the Bajorans recover from a decades-long occupation by the imperialistic Cardassians. The Gamma Quadrant is home to a hostile empire known as the Dominion, ruled by the shape-shifting Changelings, whose will is enforced by their ruthless soldiers, the Jem'Hadar, and their administrators, the Vorta. In the middle seasons of the series, the Dominion foments discord between the Cardassians, the Klingon Empire, and the United Federation of