Internal Affairs Officer Sloan arrives on the station, announcing that there has been a possible security breach. He believes an officer may be passing information to the Dominion and promptly confines the senior staff to quarters. Later, Sloan summons Bashir for a brief interview, which appears to go well. Back in his room, however, the Doctor learns that O'Brien was interrogated for two hours — about him. Just then, Bashir is taken to a second meeting with Sloan....

William Saddler (Deputy Director Luther Sloan)
Jeffrey Combs (Weyoun)
Samantha Mudd (Lieutenant Chandler)
Benjamin Brown (Ensign Kagan)

• This is Michael Dorn's directorial debut.
  
• Sloan is a Deputy Director with the Starfleet Intelligence's Section 31, not Starfleet Intelligence Internal Affairs. Section 31 is the Federation's covert operations, similar to the Cardassian Obsidian Order and the Romulan Tal'Shiar. Section 31 was formed with the original Federation Charter over 200 years ago. The Federation neither confirms nor denies the existance of Section 31.
  
• Section 31 was attempting to recruit Bashir.
  
• Sloan will return in the 7th season episode "Inter Arma Enim Silent Leges".
  
• O'Brien has a habit of dislocating his shoulder while kayaking on the holodeck, the earliest being in TNG Season 3's "Transfigurations".