
Visible crew/equipment: When Phillip is being bundled into the back of a van there are 4 men and Phillip in shot with no-one else on the street. As the van door closes you can see a crew member through the gap in the door. (00:02:56)

Hit and Run - S2-E5
Visible crew/equipment: As the car drives away after hitting Alison you can see the crew reflected in the side.

The Dark and Bloody Ground - S1-E3
Visible crew/equipment: When Rockford returns to his trailer and begins to tell Rocky about his ordeal with the semi in Arizona, just as Rockford says, "It tried to run me off a mountain," watch as the microphone pops up at the bottom, right side of the screen behind the glass bowl. (00:22:55)

Visible crew/equipment: After Wilhelmina tells Marc that she didn't use the dirt he dug up, when Connor walks in Wilhelmina walks toward him, and the reflection of the boom pole/mic is visible on the light fixture. (00:24:30)

Burning Down the House - S9-E19
Visible crew/equipment: During the scene where Mimi has moved into the warehouse, Drew makes a comment about the TV having surround sound - as the camera pans over him you can see a crew member in the background adjusting a light.

Visible crew/equipment: The set light is reflected on Joan's car as she returns to it after talking to the victim who survived. (00:21:35)

Visible crew/equipment: As the old Indian sets fire to burn his dead son, he walks towards Cain and on the left you see a fire extinguisher. (00:10:04)

The Made-to-Measure Murders - S13-E2
Visible crew/equipment: A crew member's shadow is seen moving behind an open door that a character is walking by. (00:15:45)

Visible crew/equipment: As Joe approaches the third car with the bad guy in it, there is an unknown man, possibly a crew member, reflected in the back window where there wasn't a man before.

Sex, Drugs and Rockin' the Cradle - S3-E14
Visible crew/equipment: The tip of a boom mic is swinging in the upper left of the screen during a late scene between Amanda and Peter. (00:32:13)

Visible crew/equipment: When Dani hands the spider back to Miles after he uses it to scare Flora, just after she says "Including me" and the spider moves from Dani's hand to Miles' hand, a red tape marker can be seen on the ground right under Victoria Pedretti's left foot. (00:34:09)

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 Charlie comes up with the idea of creating a false master key and designing the lock that it opens, when it cuts to them back at the office the yellow T-mark can be seen on the floor by David's foot.

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 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).

Visible crew/equipment: After the Alpha wolf breaks through the movie rental window, it frightens Lydia, who was parked outside. As the camera pans closer to her face, a protective plastic cover hanging off the camera can be seen in the car window's reflection. (00:03:55)