Visible crew/equipment: After Kai Winn grasps Sisko's ear to feel his pagh, it soon cuts to Jake delivering half the items to Dr. Giger, and when Giger removes the chip that Jake brought on the cart, the actor's yellow tape mark is visible on the floor near Giger's consoles. (00:31:00)
Broken Link - S4-E26
Revealing mistake: During the fight between Garak and Worf near the end of the episode, a Jefferies tube door is knocked out of its frame to reveal the end of the set - a dark room with a wooden scaffold and various other pieces of equipment (slow-mo helpful but not required). (00:36:00)
What You Leave Behind (2) - S7-E26
Quark: The more things change, the more they stay the same.
Emissary (1) - S1-E1
Question: Did Nana Visitor's hairstyle change from her first appearance in the episode to the next scene when they were going down the stairs?