4-07: Little Green Men
Quark, Rom, and Nog accidentally transport themselves back to the Roswell Incident on Earth in 1947.
4-03: The Visitor
When a freak accident traps Sisko in a time paradox, only re-appearing every few years, Jake spends the remainder of his life trying to save him.
4-22: To The Death
Sisko and crew assist Weyoun track down a renegade Jem'Hadar group who have located an Iconian gateway.
4-15: Bar Association
Quark’s frustrated employees organize a union and strike, prompting intervention from Liquidator Brunt of the Ferengi Commerce Authority.