In the opening sequence, Mike rides his bike with a helmet on, but it suddenly disappears when he runs into Rachel.
In the opening sequence, as Mike rides his bike to work, a phone number is prominently displayed over his left shoulder. The area code is 416, which is Toronto only, rather than 212, which is New York's.
When Scotty takes the room key-card from the CEO, she fails to grasp it the first time and lets out an audible "oops" before successfully attaining it.
When Harvey throws across the Pearson file over the desk to Scotty, all the paper flies out and is visible, but Scotty manages to covertly push the paper back into the folder and return the files to Harvey without ruining the shot.