Goof: In a scene on the Dominion ship right after the Defiant attacks and before Bashir is beamed out by Kira and Worf Bashir's commbadge reappears for a brief shot and then disappears again.
Section 31 is first introduced in the Star Trek universe.
Sloan tells Bashir that Section 31 has existed since the inception of the Federation, and that they were originally part of the Federation Charter. However, as seen in the Enterprise two-parter "Affliction" and "Divergence", Section 31 has been operating since before the Federation was founded.
Bashir: (when Sloan tries to recruit him for Section 31) Well I'm sorry, but the ends don't always justify the means!
Sloan: Really. How many lives have you saved in your medical career?
Bashir: What has that got to do with anything?
Sloan: Hundreds? Thousands? Do you suppose those people give a damn that you lied to get into Starfleet Medical?
Sloan: Congratulations doctor, it's not often we're proven wrong.
Bashir: I take it you finally believe that I am not a Dominion spy.
Sloan: I am leaning heavily towards that direction, but to erase any lingering doubts, why don't we do one final test?
Bashir: I've finished playing games with you, Sloan!
Sloan: I can assure you, this is no game.
Sloan: Our official designation is Section 31. We keep a low profile. Works out better that way for all concerned. We search out and identify potential dangers to the Federation. Once they're identified, we deal with them.
Sloan: Quietly. Section 31 was part of the original Starfleet charter. We don't submit reports or ask for specific approvals. We are an autonomous department.
Bashir: But the original Starfleet charter was created over 200 years ago. You're telling me you've been working on our own ever since? Without specific orders? Accountable to nobody but yourselves?
Sloan: You make it sound so ominous.
Bashir: You and your friends function as judge, jury and executioners, and that's too much power for any department.
Sloan: I admit, it takes exceptional people to do what we do, people who can sublimate their ambitions to the best interests of the Federation - people like you.
Kagan: I was with the Seventh Fleet when the Dominion attacked the Tyra system. Ninety-eight of our ships were destroyed in a matter of hours. I lost a lot of friends.
Bashir: I lost friends there, too.
Chandlet: I believe that, but yours were Jem'Hadar.
Sloan: I've had enough of your lies, Doctor! You think you're smarter than the rest of us, don't you? Smarter than the millions of brave men and women who are putting their lives on the line for the Federation. You want to do things the hard way? Fine. But I'm going to get the truth out of you. And when I'm done, I'm going to take whatever's left and lock it away.
In the wardroom, Director Sloan reads from a padd with the number "847" on the back. Later he waves it in Bashir's face in the security cells. Writer Joe Menosky began including references to the number 47 in almost every episode of Star Trek since season four of The Next Generation. It is an in-joke, referring to The 47 Society at Pomona College in California, a college which Menosky attended.
The Enterprise episode "Divergence" provides an explanation of the name Section 31. In that episode, Agent Harris tells Archer that under extreme circumstances, there is special permission to "bend the rules", according to the Starfleet Charter - Article 14: Section 31.
Cirroc Lofton (Jake Sisko) does not appear in this episode.
First appearance of Sloan and Section 31, the Federation equivelant to the Tal Shiar and the Obsidian Order.
William Sadler and Colm Meaney both appeared in the movie Die Hard 2. Sadler played a terrorist who crashed a plane piloted by Colm's character.
Martin Sheen was considered for the role of Sloan.