Visible crew/equipment: While Eli is in the handicap-accessible restroom, he's all alone. Then the woman in a wheelchair knocks on the door to use the facility. So when Eli exits, we can see between the door and door jamb, and there's someone inside the restroom standing directly behind the open door (presumably helping to fully open it) as the wheelchair enters. (00:22:35)
Visible crew/equipment: After Peter storms into Ruth's office angry about the "Foot in Mouth Disease" headline, a short time later, Eli walks in just in time to see Ruth explain that Peter is actually in second place and climbing. When Peter hugs Ruth and compliments her strategy, Eli walks out of the office, and we can see the orange T-mark on the carpet behind him. (00:15:10)
The Debate - S6-E12
Visible crew/equipment: After Alicia and Frank have begun their mini debate in the kitchen, the hotel employee enters the kitchen; then, as Alicia says, "The system needs to be tweaked, not overhauled," the camera rounds the corner, and we can see a red T-mark and a red tape marker on the floor. (00:23:30)