Visible crew/equipment: When Lexy is scared in the classroom and stands up, there's a closeup of her eyes, and you can see a very clear reflection of a lighting bounce-card in her eyes.
The Man with the Umbrella - S1-E3
Visible crew/equipment: When the second game starts and everyone is climbing up the stairs, two of the players are talking. The camera is in front of them going up the stairs. At one point you can see the shadow of the camera on the wall to the left.
Visible crew/equipment: After Raines shares details with Kellett about Semien's crew, when it cuts to Semien waking everyone up, just as he announces his contact with Belgian Federal Police, there's a visible T-mark taped to the floor behind Andre's cot. (00:24:25)
Visible crew/equipment: At the end, when Aunt Vi and Delilah return home, just as Miles walks into the house, the green T-mark is visible on the floor.