From 31:38 -the gunman, with his weapon in hand, falls and then catches himself using both hands. Then at 31:42 he has somehow recovered the gun and begins shooting.
The bottom of the elevator in which Elizabeth and Reddington go down at first shows a large grill, which then mysteriously disappears in the next shot.
At 01:13 -yeah. You're not going to get a good read off a thumb that is covered with blood.
It is not explained: just how did Liz sneak the thumb drive through the security checkpoint.
Red and Liz ride 300 feet down in an elevator yet climb back out in just a few moments using stairs.
Ressler kicks a man laying on the scaffolding until he falls off, to his death. This is murder -yet it is never mentioned.
Wujing is described as a victim of China's one-child family policy, "thrown away" because he was a second child. He is also described as having been a terrorist "for decades." The one-child family policy was enacted in 1982, making Wujing far too old to have been affected by it.
When Reddington is at the park playing chess he says to his contact that, "The gentleman I usually contract with is unavailable - stung by a manta ray off the barrier reef in Belize." Manta rays do not have stingers.