When Angela and Margaret are at the bar of the Dirty Robber, Angela is on the phone talking to Lewis, telling him not to call Margaret anymore. She hangs up the phone and Margaret asks, "How did he take it?" As she says that, there are three cases of Blue Moon beer on the bar next to her. When she says her next line, "I know, he never listens!", there are now four cases of beer on the bar next to her. When she says her next line, "Perfectly", there are three cases of beer.
When the swimmer throws the shoe with the foot in it onto the beach it lands upright. In the next scene when the girl screams it is on its right side, then on a wider shot it is on it's left side. When Maura examines it, it is back to upright.
When Angela is giving the bar patron advice on proposing to his girlfriend, the same couple in the background is seen entering the scene and seating themselves twice.
When Korsak has Burke at gunpoint you can see the police car front driver window is down and the spotlight is pointed at the hood. The camera switches to Korsak then back to Burke now the window is up and the spotlight is pointed forward.
Frankie says the AMA has suspended Dr. Murray's medical license. State licensing agencies are responsible for licensing, not the AMA.
The feet are the only area of the body that invert and evert. They had Maura say supination when describing the strike pattern on the shoe, which is inaccurate. It would be referred to as inversion if it dealt with the feet as the feet cannot supinate.
Just a few minutes into the show when the three are with the foot on the beach you can see the sun on all of them. For example it shows Rizzoli and Isles the sun is behind them there are Shadows on their chest. Less than a minute later Isles is squat down looking at the severed foot Rizzoli and Korsac go to leave you can clearly see the tent or canopy or whatever providing shade for Dr. Isles.