Mr. Monk and the Blackout - S3-E3
Deliberate mistake: As Monk is using the night vision goggles in his house the lights suddenly come back on and continues on still thinking that the intruder cannot see him. The light coming on should have blinded him or at the very least he should have been able to tell there was more light than before even if he hadn't had much experience using the goggles. All the lights in the house come back on and the amount of light would be too noticeable with night vision. This would have been deliberate as Monk continues to think the intruder still doesn't see him in the dark and is part of the joke in the scene.
Mr. Monk and the Blackout - S3-E3
Visible crew/equipment: During the police investigation at the power station, the shiny blue construction helmets show us the stage lights, reflectors, camera and film crew several times. (00:09:00)
Mr. Monk and the Blackout - S3-E3
Continuity mistake: When Sharona is trying to comfort Monk after he gets off the elevator, she's holding his hand and rubbing his arm. When Michelle walks away, in the next shot, Sharona's hands are on Monk's chest and shoulder.
Mr. Monk and the Blackout - S3-E3
Continuity mistake: When the second bomb is being placed (after the restaurant scene), the bomber is holding the bomb by the ends (the short side). In the next shot it's being held by the front (the long end).
Answer: The two men are trying to work out a secret deal between them without involving the union, which means the workers' interests aren't being represented and defeats the whole purpose of a union. The mayor would lose labor's support and Cusack's union troubles would just be starting.
Captain Defenestrator