Visible crew/equipment: After Baez tells Danny that detectives from Moscow are on their way to help with the investigation, when it cuts to Anthony entering the courtroom, just as Erin removes her glasses the T-mark is visible on the floor behind her, at the bottom left side of the screen. (00:08:35)
Visible crew/equipment: After the opening credits, when it cuts to Frank's office a red tape mark is visible on the floor near the window, at the right side of the screen. After Nicky leaves the office it appears Frank walks to that area to look out of the window. (00:04:35)
Visible crew/equipment: When Danny and Baez are at the scene of the firebombing while it's raining, in the second shot as they walk toward the eleven body bags, three nylon T-markers (yellow, red, and green) are visible on the wet ground where Baez, Danny, and Molina will be standing in the following shots. (00:02:45)
Visible crew/equipment: After Danny tells Linda all that matters is her brother is alive and her family is safe, when it cuts to the courtroom there's an overhead shot from behind Frank, and the actor's yellow tape mark is visible on the floor at the left side of the screen. (00:34:20)
In and Out - S7-E14
Visible crew/equipment: While Danny and Baez are hiding in the hall, when Ramirez (parole officer) knocks on Lloyd 's door he gets the gun from under the seat cushion, then as Lloyd starts to walk to the door, the green T-mark is visible on the floor near the right side of the screen. (00:34:20)
The One That Got Away - S7-E13
Visible crew/equipment: After Eddie tells Jamie that she wanted Josh to swoon over her like Caroline seems to be doing with Jamie, when it cuts to Erin as she tells Danny that Child Services will likely release the boy to his parents, as Danny says, "Hold on," the green T-mark is visible on the floor. (00:22:30)
Confessions - S7-E9
Visible crew/equipment: While Frank visits with the Cardinal to tell him about the time sensitive situation, when Frank asks about St. Mary's surveillance cameras as they both sit down, the small green T-mark is visible on the rug under the Cardinal's chair. (00:23:40)
Visible crew/equipment: After the family dinner, when it cuts to Jamie standing at the sink loading the dishwasher, the green T-mark is visible on the floor behind his feet. (00:29:10)
Visible crew/equipment: At the start, when Erin is interviewing Miranda they take a break, and just as Miranda says she's starving and stands up, the red T-mark is visible on the floor in front of Anthony's feet. (00:00:55)
Visible crew/equipment: When Danny tells the M.E. what the victim shouted prior to being hit by the car and what the word means, the reflection of the moving camera is visible on the glass. (00:07:25)
Visible crew/equipment: When Erin walks into her office and finds Robert waiting for her, as she walks past him toward her desk, the green tape mark is visible on the floor near Robert's feet. (00:01:00)
Visible crew/equipment: Towards The End of the episode as ADA Reagan is walking to her car, you can see the cones in the DAR end of the street the filming crews used for traffic control to keep traffic off the set. (00:02:30)
Answer: It is the lapel pin worn by members of the NYPD Honor Legion.
The lapel pin is on Danny but not Biaz, why? Also, Baker, Sid, Frank &Garrett wear one. Significance? Are they all the same?
Is the P.C.'s pin different than a legion pin? What are the symbols and their meaning?
But why would the mayor wear one?