A Single Piece Was Lost - S1-E10
Visible crew/equipment: When the Gruenaks attack the Scientist a puppeteer is visible to the right of one of the Gruenaks, just before it grabs the bird cage and throws it onto the Scientist's head. (00:28:18)
Visible crew/equipment: After Hutch finds the ticking box with the clown and Starsky's badge inside, when it cuts to Hutch and Dobey walking toward the squad room, the cameraman and camera are reflected on the door's glass window. (00:17:20)
Visible crew/equipment: When Nina hands Casey her glass, a boom mic is visible.
Visible crew/equipment: Michaela and Jared are driving through the woods in the "middle of nowhere" but as they round a corner after making a right hand turn you can see the whole crew behind them on the road just before the scene cuts. (00:20:21)
Visible crew/equipment: As Louie is being beaten up by the blonde lady, the shadow of the hand-held camera filming the scene is seen.
El traje del tío Jacinto - S2-E16
Visible crew/equipment: In the credits, there's a unknown person hiding behind Don Ramón (Raymond).
Visible crew/equipment: When Andy talks about naming the baby "Bernardo", a boom mic can be seen reflected in the glass of a cabinet to his right.
Here There Be Dragons - S2-E11
Visible crew/equipment: When Prax leads the group to where Dr. Strickland took Mei, just as they reach the door the two green and yellow T-marks are visible on the floor. (00:02:30)
The Color of Truth - August 8, 1955 - S1-E7
Visible crew/equipment: The shadow of the camera is visible on the car's hood when Al is trying to convince Mrs. Melanie not to go after Sam. It lingers there for a while in the shot.
Episode #1.7 - S1-E7
Visible crew/equipment: The Spitfire in the hanger has 1944 D Day markings in 1940. Also, this 4 prop Mark of spitfire wasn't available in 1940.
Visible crew/equipment: As the steam train is pulling away in reverse with Peel and Albert on board, a bald crew member can be seen crouching in one of the carriages.
Chapter 27 - S3-E1
Visible crew/equipment: A reflection of a cameraman is visible in Frank's watch as he reassures Doug that he has a place at the White House. (00:40:30)
Visible crew/equipment: When the Lone Gunmen return to their van after meeting Jimmy, when Langly opens the driver's side door, you can see the reflection of two crewmembers' feet in the rear view mirror. (00:24:20)
Visible crew/equipment: When Brody and Carrie exit the bar and open the car door, a big lighting equipment screen is reflected on the door.
Visible crew/equipment: After Doctor Ellingham finds the sofa on the road, Bert shows up and sits down on it and talks. As he does, watch the side mirror when Doctor Ellingham returns to his car. When the door opens, you see the reflection of a cameraman or other crew member reflected in the mirror. (00:02:05)
Reformation - S3-E10
Visible crew/equipment: During the opening sequence when two hoodlums are walking out of the convenience store, a lighting rig and crew can be seen on the right-most part of the frame. (00:02:15)
Visible crew/equipment: During the prison escape, as Phelps and Cole are stealing the car, a microphone can be seen above them, hanging more than a foot into the shot. (00:18:20)
Visible crew/equipment: When Joel and Ellie cross the bridge, you can see crew on the left, in the overhead long shot. This show is an HBO Original, and the mistake has been edited out in the current streaming version. (00:14:35)
Visible crew/equipment: Season 3, "Birthday Cake": When Littlejohn goes into the river, you can see the reflection of the entire camera crew.
Visible crew/equipment: When Arthur goes to Dragoon to ask for help, when Dragoon runs out of the hut to turn back into Merlin, on the left hand side of the screen you can see a camera crew in modern clothes. [Fixed in Netflix version]. (00:23:00)
Suggested correction: I don't see any crew. I'm watching it on Netflix. Perhaps they fixed or perhaps they edited it out after realizing the mistake. But they aren't there anymore.
Even if Netflix corrected the mistake doesn't mean the mistake is now invalid if the mistake existed in the original BBC One airing. Netflix is known to change or edit programs they stream (such as replacing soundtrack songs).