Visible crew/equipment: When Michael breaks into the car, after he drives off you can see a camera standing in the back seat in the car, and it's pretty clear it's a stunt man driving. (Helps to pause at 18:07.) (00:18:05)
Audio problem: When Michael is forced to do "errands" for Brennen, they stop by Jonathan Carver's house to get numbers from him for a voice key. The code played back at the facility is 71348. He says "3" in a medium pitch (tone) at the house, but it is high pitched when played back at the facility; he says "8" in a medium pitch, and it's also high pitched later. And finally he says "9" in a low pitch and it's played back medium pitch. Also very obvious is the fact that Jonathan never says "1" or "7."
Continuity mistake: During the scene when Michael is attempting to deceive Brennen into letting him and Nate go (from the time Brennen receives the picture message to when Brennen leaves), Brennen's necktie (right below the knot) changes from having a dimple to being flat, 6 or 7 times during the scene.
Character mistake: Near the end, when Michael reveals to Brennen he knows everything about him, he says, "I know everything about Tyler Brennen." Michael emphasizes "Tyler" as if it's a big deal that he knows Brennen's first name. Michael already knew Brennen's first name from the first time he met him, in Season 2, Episode 15 "Sins of Omission."
A Dark Road - S3-E10
Other mistake: In this episode, Michael, Fiona and Sam are boxing in the bad guy's Corvette, trying to make him crash. Despite repeated hits to the side and back of the Corvette, just before the Corvette crashes, there is no visible damage on the bad guy's car.
Continuity mistake: When Michael's mother is arrested, we see the cuffs go on with her bracelet nearer her hands than the cuffs. The shot changes and suddenly her bracelet's further up her arm - no way it could have moved there past the cuffs.
Chosen answer: It might not actually have one, in which case, he'd have to go down into the club and use theirs. As for showering, going to his mother's house or a gym membership would take care of that.
Captain Defenestrator