Miracle Man - S1-E18
Continuity mistake: In the establishing shot of the courthouse the subtitle reads "Kenwood County Courthouse" but you can read on the building that it is the "DeKalb County Courthouse". (00:15:15)
Continuity mistake: At the end of the episode, Odo has sent everyone affected by the telepathic matrix to a cargo bay. Sisko and O'Brien remove their com badges, throwing them aside before heading to the bay. After everyone is cured, Sisko straightens back up and, in the closeup, you can see that he has a badge on. In the next closeup, it's gone again.
If You Can't Be With the One You Love... - S5-E18
Continuity mistake: When Shawn is cracking open his beer, he grips the top of the paper bag between his forearm and upper arm, with the top of the bag level with his shoulder. When the shot changes, the bag is suddenly lower. (00:09:15)
Visible crew/equipment: While Dr. Mike is unsuccessfully trying to make supper Olive returns with the children, and after Olive says goodbye to them, when Dr. Mike closes the door a white T-mark is visible on the porch. (00:08:55)
Revealing mistake: When Lois and Clark are checking out Lenny Stoke and Derek Camden on Lois' computer, you can see the computer screen showing the script for Lois in that scene. (00:07:40 - 00:08:20)