Visible crew/equipment: About half way through when Michael enters his mother's house, she thanks him for the new coffee maker, then on the right is a woman whose head moves. In the next shot she has her hand over her mouth. (00:23:45)
Revealing mistake: Near the end of the episode, when Andy opens the front door to meet Baranski the loan shark, he leaves the door open behind him for the camera man.
Continuity mistake: When Michael is talking to Barry, Barry's hands change position with each shot. On the table, folded together, holding his glass, etc.
Character mistake: Michael states that if you touch someone being tasered, you'll be tasered too. That's not true unless you touch them right between the probes. And in a later episode Michael's touching a man being tased with no ill effects.
Revealing mistake: When Sam pops open the cabinet with the wire he will later cut, you can see that the wire was cut and glued together again. When Sam cuts the wire some time later, it's in perfect condition. The taping was probably done in reverse order.
Plot hole: Someone as careful and controlling as Timo would never force anyone into working for him, for exactly this reason.
Revealing mistake: When Victor is opening the padlock, sparks fly around in close ups. In the wide angle shots there are no sparks at all.
Continuity mistake: When Ricky leaves Michael's apartment he has the envelope with money in his left hand. When the shot changes, we instantly see him walking away empty handed, with the envelope lying on the table.
Continuity mistake: Michael makes the target/client use a faulty pen that spill ink all over her hand. When Michael is in the bathroom and holds over the targets mouth, his shirt gets dirty of the ink from the target/clients hand. After this, it switches between the shots and Michael having a dirty and clean shirt several times. (00:10:53 - 00:11:46)
Good Soldier - S2-E9
Revealing mistake: As Michael is on the motorcycle headed toward his loft, just before he goes under the semi-trailer, you can see the long hair of the stuntman on the bike.
Good Soldier - S2-E9
Revealing mistake: When Michael is sliding under the semi trailer you can see multiple scrape marks going under the trailer. They probably tried to get the shot a few times.
Do No Harm - S2-E10
Revealing mistake: The drawing little Jack made was reproduced on a printer; it has a perfect 1cm white border around the drawing.
Continuity mistake: When Chandler's car explodes, he and Michael land prone on the ground facing the explosion. When the shot cuts, they're facing the opposite direction. (00:33:35)
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