Who Are You? - S1-E4
Continuity mistake: Magpie is trying to steal a Faberge egg. We see her lowering herself from the ceiling, a POV shot that positions her right in front of it and she makes the grabby hand gesture thingy like in her first heist. Batwoman throws a batarang, severing her cable and she falls on the floor, vertically. Nowhere near the jewelry case that was supposedly in her reach. (00:09:50)
Who Are You? - S1-E4
Continuity mistake: Magpie tosses aside the cable severed by Batwoman's batarang. In two different overhead shots, the cable lies on the ground in two completely different ways. Even assuming during their fight they could have accidentally hit one end of it with the foot when it was not in frame, it still does not account for the massive difference. (00:10:00)
Who Are You? - S1-E4
Plot hole: Analyzing the remains of the explosion on the bridge does not lead to the retrieval and identification of the detonator who triggered the bomb, but Sophie deduces that it must be unreleased technology from Hamilton's, because of the extreme precision with a convoy that had 7 vehicles. The vehicles in the bridge scene in episode 2 were proceeding in a line and several meters apart. There was nothing unique in the detonation as shown, any stooge pushing a button on a remote control could have hit with the same 'precision' without breaking a sweat. (00:12:30)
Who Are You? - S1-E4
Factual error: The very first shot of Kate and Reagan taking a walk in downtown Gotham for the lunch date is a wide-angle view. Several flags on the right side of the screen are visible, including the City of Chicago flag with its 4 red stars and the State of Illinois flag. (00:13:20)
Who Are You? - S1-E4
Continuity mistake: Kate is on her lunch date with Reagan. Panning shot of the Chicago aka Gotham street. There's a family with mom, dad and two kids, with a girl in purple that climbs up leaning on the railing, and her brother follows shortly. A closer angle follows ("Why the hell did you move back here", Reagan asks) and the two kids have yet to step to the railing, and do it in reverse order. Even more remarkable; at the very end of their long conversation, in the shot when Fox's message pops up, they are STILL by the same family despite the fact that they have been walking and passing several other people all along. (00:13:20)
Who Are You? - S1-E4
Continuity mistake: When Reagan says "Sound like I have nothing to worry about" referring to Sophie, to the left of the frame a black couple meets a friend in a hug. In the next shot, they keep walking and Reagan says "I used to live there", passing by the same guy, not yet reached by the friend. (00:13:45)
Who Are You? - S1-E4
Plot hole: Fox is alerted by the alarms that there is an intruder in the house, exactly in Wayne's office. He has to make his way up from the Batcave to the main residence, enter by the door and then he gets knocked out by Magpie. As it turns out at the end of the episode, she had the place perfectly scouted (and it was shown anyway that the intruder was already in the office when the alarm rang), so there's no reason at all why she'd still be there to assault him, considering the necklace was not guarded by some bulletproof crystal or anything of the sort and if she planned such a bold theft in broad daylight she surely wouldn't take her time to get what she came for. (00:15:25)
Who Are You? - S1-E4
Plot hole: The whole "booby trapped frozen room" does not make any sense. Let's try to ignore the fact that it is entire speculation and a huge leap of faith on Mr. Fox's part that the trap works that way or that it's the only one, and that it wouldn't make sense (especially for a thief) to have something so erratic rigged to destroy your whole expensive equipment and jewelry stash - at most something directed at the door or a small charge to destroy your HD to cover your tracks. Still, it is supposed to react to any minuscule variation of temperature in the room and is triggered by a small sneeze, but Batwoman opens the door normally, and that alone would create a variation in temperature much bigger than her breath's (just think of what happens when someone does that in real life!). (00:21:40)
Who Are You? - S1-E4
Character mistake: In his drug-induced stupor, Dodgson thinks he is talking to Alice and says that "She" does not know about Mouse, 'She' being Batwoman. Because, again, he is supposed to be talking to Alice. But his last line is that 'She' has big plans for him, and that would be Alice. (00:25:00)
Who Are You? - S1-E4
Continuity mistake: In the three-way meeting during the museum party, Sophie says "Sorry, I didn't realise you were here with anyone." A woman in a flower dress passes right behind her. Cut to Kate for awkward moments of silence, and back to Sophie, with the woman who did not make a millimeter of progress in her walk during that second. Even worse, seconds later when she says "You two have fun" the same woman is repeating the action from the beginning. (00:28:25)
Who Are You? - S1-E4
Factual error: At the end of the episode, Batwoman shoots her Bat-rope at the villain and yanks her off the building she made her escape to. Magpie is not a superhuman invulnerable being; assuming the grapple didn't puncture anything in her flesh and just hooked to some part of the costume like her backpack, she still is pulled with force from well above the 5th floor of a building to the end of the street, back first into a fountain, with a water level so shallow that she backpaddles into it as soon as she lands without being submerged. She does not experience a single moment of shock or stun from an uncontrolled fall of that magnitude. (00:33:00)
Who Are You? - S1-E4
Continuity mistake: When Reagan and Kate have the break-up talk, Reagan catches her in a lie and says "You just said you were on a call." Behind her, a man with a conspicuous shirt (black with red drawings on it) walks off, and is in a following shot walking down the street, leaving for good. Right before she says "All I ask for is a little honesty", several seconds later, the funny shirted man is back behind her. (00:34:05)
Who Are You? - S1-E4
Plot hole: The whole pearl necklace situation is a scene choke-full of mistakes. What we witness is Batwoman 'protecting' people from explosions of terrible superimposed CGI who look absolutely harmless, don't hurt anybody, are generally tiny and at great distance from everyone. The culmination happens when to thwart the threat of the single pearl left (the pearls all explode at different times, must have super high tech nano-detonators) Batwoman throws the batarang with millimetre precision at the small hand of a little girl, somehow knocking away the object, somehow not making it explode (how could she know hitting it violently wouldn't?) and leaps on the girl to shield her eyes from the explosion. Explosion which should be very distant since it comes from a single tiny pearl violently knocked away by a metal batarang before Kate' sprint, but somehow is still so big and devastating to horrify the crowd, larger than anything seen in the museum with dozens more and close by.
How Queer Everything Is Today! - S1-E10
Factual error: Kate fires a grappling hook into the back of the runaway train - it punctures the thin back door easily. She then fires another one backwards which hooks against one of the sleepers on the tracks. The slack gets taken up...and the train jolts to a dead stop as the hooks bite, (with everyone just wobbling on their feet somehow). No way on earth that's possible - the back door would have been torn off/open like a tin can and/or the sleeper would have been yanked out out of the ground, and the train would have ploughed into the station at full speed. Not to mention the fact that only after the train stops does the sleeper apparently give up the ghost and break. The magical supermetal of the train door is somehow still intact.