This episode marks the first appearance of several new sets aboard the Defiant, namely main engineering, the mess hall and the extended corridor set.
This episode marks the last time Alexander Siddig is credited as Siddig El Fadil as an actor. As a director, however, he remains credited as Siddig El Fadil for "Business as Usual".
According to the Star Trek: Deep Space Nine Companion, the rifles used in this episode are the first rifles ever seen in Star Trek which actually have a trigger.
Ronald D. Moore is a big fan of this episode because he considers it to be very un-Star Trek.
Final appearance of Sisko with a full head of hair.