The Defection of Hawkeye - S1-E8
Other mistake: When Hypnotia is taking pictures of the hypnotized Clint standing next to Justin Hammer, there is camera flash and the sound of a picture being taken indicated for every picture. One of the pictures that Clint is later shown is of Justin Hammer putting a stack of cash in his hand. However, there was no corresponding camera flash or sound of a picture being taken for this particular photo. (00:14:21 - 00:15:56)