Revealing mistake: At the river to cross over to Mt Weather, the vine used to swing across the river is just a standard rope, camouflaged. You can see it best when Finn recovers it after Jasper has jumped.
Continuity mistake: While trying to restart the engines after the ship is hit by the nuke's EMP, Chandler is checking the fuses while Chung is going through his checklist. There are only five visible fuses in the six available slots in the panel that Chandler is checking. After he gives the order for Chung to "give it a kick-start," the slot which previously had no fuse now does, only for it to shoot out from the start attempt.
Insane in the Membrane - S2-E6
Visible crew/equipment: After Hamilton tells Pride that he will arrange for Kendrick's grandmother to stay at the assisted living facility in his district, when it cuts to Kendrick and Percy walking toward Pride the red T-mark taped to the rug can be seen at Pride's feet.
Sea Change - S3-E1
Continuity mistake: Henry takes off his watch while sitting bedside. He stands up to take off his suit jacket, goes into the closet and returns into the bedroom, and his watch is back on his wrist. (00:14:00 - 00:15:00)
Who Shaves the Barber? - S1-E7
Continuity mistake: When Molly visits Wes Wrench in the hospital we see the whiteboard on the wall has writing on it. Molly takes it off the wall and hands it to him without erasing it and it's suddenly blank.
The Thing About Heroes - S5-E2
Other mistake: Officer Burgess kicks in a door with a lock and deadbolt and does no damage to the door frame. (00:46:21)
The Saint of Last Resorts - S1-E8
Continuity mistake: John throws some stones onto a table to investigate whatever took the baby. The angle changes and they're in a completely different arrangement.
Visible crew/equipment: When Molly walks into the "memory lane" tent at the carnival, four shots in we can see the reflection of a crewmember (moving dark silhouette) on the glass display beside the entrance. Then as Molly turns the crank and looks into the Mutoscope, in the wideshot we can see a crouching male crewmember hiding behind the case, at the left side of the screen. (00:28:15)
Continuity mistake: When Jerome get stabbed in the neck, in the first shot the blood comes from his mouth and goes towards his eye. In the next shot, there's no blood trail going to the eyes, but instead to his cheeks. (00:34:50)
Single Point of Failure - S1-E2
Revealing mistake: Walter accesses code on the sick girl's laptop to trace the source of the virus - aside from the fact that the code comes straight up a fraction of a second after his hands even touch the keyboard, the code displayed in the black window is for a set of traffic lights, with lines like "Walk/Dont_Walk" and "Green_Arrow/Yellow_Slow." (00:08:10)
Revealing mistake: When Iris is sitting in bed recording the message for Barry, she is holding her iPhone so that the start button is on the left side, but the "video record" button appears on the right. Additionally, her right hand covers the speaker area of the phone fully, including the front facing camera. It is impossible for Iris to be recording the video live and reveals that the video footage was recorded ahead of time. The illusion that the video is being recorded by Iris live is further ruined by the fact that the room lighting is turned off in the scene, but the recording is well lit. (00:02:55)