When Marcie is taken by the Washington's FBI agents, Wedeck is telling the team to get some positive done today, during his talk his left arm is scratching his ear, and in the next shot he got his left hand in his pocket.
The shooter at the homeless shelter was thought to be driving a "1970's sedan, foreign make"; when the driver of such a car is found later, the car parked at the curb was a Ford coupe, clearly not a foreign sedan.
When Marcie is being interrogated she says that she would leave messages in a dead drop. Yet she is outed when it is noted that she adds sugar to her coffee while outdoors to signal her handler. That is not how dead drops work. The person leaving the message leaves a sign in public that the other agent can see at any time, such as a chalk mark on a stop sign, a used soda can at the base of a tree, etc., so that the handler can know that the dead drop has been loaded. The reason for this is that the contact doesn't have to keep a schedule. They can drive by the signal at any time of the day. They are not restricted to waiting for a person to take a coffee break.
When Zoey is questioning Demetri on the witness stand, she confounds him by insinuating that a red jacket is not the same as a dark jacket. This is actually quite ignorant. She is confusing the depth of color saturation with the tonal value of that color - the position of a color on the spectrum (hue) versus the relative darkness of a color (value). It appears that Zoey is not confusing the two intentionally but because it hasn't occurred to her that a jacket can be both red and dark at the same time.