When Gideon briefs the team about the changes to the timeline, Sara has just one hand on her coffee mug. In the next shot, the mug is in both hands.
At the start of the episode, just after Charlie leaves, John holds up his hands to view a necklace. When the shot is facing John, the necklace is hanging off his hands, but when the shot changes, it's wrapped around his hand.
Ava mentions that she has a hobby of reading about serial killers, and when asked about the quiz on the box of Big Easy O's cereal, (Who is the most prolific serial killer in the United States?), Ava says that the correct answer is Ted Bundy, but that in her opinion, John Wayne Gacy had more victims than he confessed. In reality however, John Wayne Gacy had more confirmed victims than Ted Bundy.