Visible crew/equipment: After Tom's "wife" has been kidnapped, he dives out of the way of the kidnappers' van as it speeds towards him. As he hits the ground, you can see a protective rubber mat bounce up as he comes into contact with it.
Visible crew/equipment: When Winn is putting on his shirt after being caught, you can see his mic wire through the hole where Kara says he forgot to button his shirt. (00:03:15)
The Town Where No One Got Off - S1-E4
Visible crew/equipment: The overhead boom mic dips into the scene as the old man is speaking.
The Losers - S1-E4
Visible crew/equipment: When Lodgepoole is telling Marshall about how the Bureau of Lost caused the Great Depression, someone's arm becomes visible in the upper left corner of the screen. (00:12:51)
Visible crew/equipment: A boom mic's shadow is visible as Bolger speaks to his assistant in the police office.
Visible crew/equipment: When Sydney taps the shoulder of the baddie who nearly disarmed Nigel, a strong light is cast on his face just before the cut. Nobody was supposed to point a flashlight or a torch at the fight. (00:38:15)
Visible crew/equipment: You can see cameras, crew and what appears to be a bonfire reflected in Emma's visor when she is dressed as the White Wild Force ranger. (00:15:00)
Visible crew/equipment: After Jax cuts the rope that's supposedly keeping the trap in the air, as Marty falls to the ground you can see the cable that is actually holding the whole contraption up while the rope falls a bit to the right.
The New Guy - S3-E3
Visible crew/equipment: After Penny asks everyone on the ship to double-check that everything is tied down, when Will tells Robot that he thinks he found something to help them later, there's a yellow T-mark taped to the floor which is visible at the bottom of the screen. (00:31:20)
The Little People of Killany Woods - S1-E34
Visible crew/equipment: When it's opened for Mulvaney, the hardware store's glass-paned door reflects several large, round studio lights. (00:06:05)
When You Get Back to Mars, Are You Going to Get It - S3-E24
Visible crew/equipment: When Tim and Martin are carrying Andromeda to the bedroom and Martin opens the door with his Martian finger, the crewmember actually opening the door can be seen on the hinged side of the door. The crewmember continues to move in that space for about 3 seconds during the scene. (00:10:00)
Visible crew/equipment: When Dick wants to go along with Mary to a wedding he tries to convince her. When he says "Whatever it takes, I'll do it" he walks forward. Take a look at the top of the screen and you'll notice the shadow of the boom mic on the wall following him.