Lightspeed - S5-E8
Revealing mistake: When the HIVE Five exit the museum and are intercepted by Kid Flash, Mammoth loses both his pants and the artifacts he has before KF whizzes past him. It's best seen in slow motion; at normal speed this mistake is hard to catch.
Task Force - S2-E16
Revealing mistake: The eyes of the corpse of William Mace blink as the ambulance medic covers the body with a blanket.
Destiny (2) - S1-E22
Revealing mistake: Throughout the scene where Max interrogates Pierce, the projector changes slides at irregular intervals with no one touching it. (00:22:50)
Just Let Go - S1-E4
Revealing mistake: When Lexy falls through the railing, there's a few shots where you can tell she's been replaced by a (probably adult) stunt double. She suddenly seems quite a bit taller, and noticeably has more muscle tone in her legs.
Revealing mistake: There are bullets placed on the counter, the one casing has a hole in it from being drilled to show it's a dummy round and there's no gunpowder in it. (00:14:45 - 00:15:20)
Beauty Rest - S4-E5
Revealing mistake: Kathy Ireland is supposed to be dead but watch carefully and you'll see her chest move when Minnie Driver's doing CPR.
Revealing mistake: The bullets the priest takes out of the ammunition tray have no primers. (01:01:33)
When in Rome - S1-E3
Revealing mistake: Will and Frankie are in a boat. In the first wide shot the boat is going rather slowly, in the next shot they are speeding many times faster, and the shot is erratic, showing that the action was speeded up. (00:02:05)
Revealing mistake: When Mr. Hathaway contacts Scotty as they dig up his son's bicycle, a shot of Hathaway shows Los Angeles' US Bank Tower in the background. The series is set in Philadelphia.
Revealing mistake: Hannah sits in a conference room and pulls a landline phone towards her to dial her friend, asking about the will Owen left. The phone however isn't in any way connected, hence no call could have taken place.
Revealing mistake: When Caitlin gets pushed down by the guy stealing her scooter, she hits her head on a rock and blacks out. The 'rock' is seen compressing from its foam design. (00:10:30)
Revealing mistake: During the "power outage" when Brian is out on the street during the day, all the stop lights and cross walks are on - you can also see the lighting is on in the windows of office buildings.
Revealing mistake: The list of intelligence agents names that Johnny Marks steals is a list of the same names repeated over and over again.
Revealing mistake: June goes to an airstrip to fly to Canada, but all the abandoned aircraft on the field are ex Canadian Air Force, meaning it was probably filmed in Canada.
Revealing mistake: A satellite photo is shown of Byran Mills' house in the first third or so of the episode. Later on in the episode, towards the end, a satellite photo of the cartel's secret landing strip is shown. They are the same photos, only one is zoomed in a little more than the other. (00:16:10 - 00:35:30)
Revealing mistake: In the morgue when Mike is just about to cover the first dead body, if you look closely you will see the body's eye move. (00:04:10)
Revealing mistake: Driving through Paris, the speedometer of the Police BMW car is at 0kph (rev counter shows car at tick-over).