Why did the Women's Bathroom only say Jules until Leah Kerns joined the team? It makes sense if Jules is the only female S.R.U. member, but we know for a fact that Donna Sabine joined the team on a temporary basis, then joined Team Three, then ended up leading Team Three. Is there a bathroom just for Team One? Does Donna have a bathroom on a different floor with Donna on it now that she's (hypothetically) the only female member on Team Three? What about Kira and Winnie? Where do they get dressed at? Is Team One the only team that has locker rooms/showers in the Barn? We saw other teams working out in the Barn in "Haunting the Barn", so what gives?
Most likely, each team has their own staging area, which would be a logical way to avoid tripping all over each other, and occasionally uses each other's facilities when maintenance or something similar is taking place.
In "The Other Lane", Ed's brother Roy had stolen $100,000 from the police evidence locker. In a real life situation, Roy would not only go to prison but won't be trusted as a cop again after pulling off police misconduct even if it was to help bring down a gunrunner. So why did Ed say he'll put in a good word for Roy?
5x05 was a plot that could have been solved fast if not for Canada's gun laws. The boyfriend of the victim follows the Villain of the Week, a Serial Killer, and manages to cut him off. The villain gets out of the car and charges the boyfriend, stabbing him. If he were allowed to own a firearm, the boyfriend could have blown him away the second the villain got out of the car. Result: rescued girl and dead serial killer.
Logical fallacy: the assumption is that if guns are easier to get, the victim would be saved because the bystander would be armed. In reality, the killer would likely also be armed. And guns are not difficult to get in Canada, they're just somewhat more difficult than the US, and tracked much more easily.
Why does the Joker have green hair, red lips, and white skin. This one's origin story is not a chemical bath, so why keep the similar appearance? Unless, of course, it was done to surprise the reader when their identity is revealed, but there's still no explanation for anything but the smile.