Power Play - S5-E15
Corrected entry: In the Episode 'Power Play' there is a scene where Worf and two security guards are running through a corridor on their way to Deck 13. Just as the scene starts, a man in tan pants, a maroon button-down shirt, and a brown belt is walking down the center of the corridor alone. As Worf and the guards enter the corridor a split-second later, the man turns around, sees them coming, and gets out of the way by pressing himself against the left wall of the corridor. I'm guessing that it's an incorrectly-dressed actor?
Correction: That is not an incorrectly dressed actor. There are many civilians and families onboard the Enterprise, or he could have been an off duty officer.