Continuity mistake: Dr. Cox's hair colour and length change back and forth significantly during the episode.
Continuity mistake: The woman in the wheelchair that Dr. Cox claims is dead is wearing glasses in some shots but not in others.
My Way Home - S5-E7
Character mistake: Early in the episode, Keith pages JD from home to the hospital. When JD arrives, he asks Keith what's the big emergency and Keith asks if he wants the patient to be prescribed unfractionated or low molecular weight heparin. JD gets angry and says that they're the exact same thing. This is in fact completely incorrect. Low molecular weight heparin is made from fragments of unfractionated heparin. They have different effects in their metabolism, half life and dose monitoring (unfractionated needs a blood test, low molecular weight doesn't). The choice between unfractionated and LMWH is an important clinical decision and should not be dismissed as "the exact same thing".
Continuity mistake: In the apartment there is a cardboard box on a table, with a strip of blue tape on it and a tube of paper sticking out of it. A few shots later another strip of blue tape suddenly appears on the box and the tube of paper has vanished. (00:02:35 - 00:03:15)
My Best Friend's Mistake - S1-E3
Continuity mistake: In the apartment, when they decide to watch "Fletch", there is a yellow cushion under J.D.'s right arm, sitting on the sofa. But it disappears between shots. (00:05:50)
Continuity mistake: When Elliot and J.D are going up the stairs and J.D asks if they are racing, Elliot has a watch on her left hand, then in the next shot when they are racing, the watch is gone and doesn't reappear.
Continuity mistake: Right at the end, the shot shows Carla walking towards JD with a security guard in the background, the shot cuts to behind JD and suddenly the security guard has moved forward in position dramatically.
My Journey - S3-E2
Revealing mistake: When Elliot is splashed by the dolphin, if you watch carefully you can see her hair is already wet.
My Best Friend's Mistake - S1-E3
Visible crew/equipment: In the scene where JD and Elliot are treating a patient and JD says "It's the closest thing I had to a date recently" the microphone pops into screen from above at least two times.
Continuity mistake: As Kelso goes rolling by in the hall with the wheels on his shoes, you can see they are actually skates and the wheels are black. When he asks who put the tiny wheels on his shoes, the shoes are now normal and the wheels are white.
My Half-Acre - S5-E9
Continuity mistake: Season 5-9, Episode: My Half-Acre. While Cox and Carla are telling Mrs Wilk about her treatment, the cardigan she is wearing is completely unbuttoned. When the camera goes for a closeup of her face, the cardigan is now buttoned right up to her neck.
My Half-Acre - S5-E9
Continuity mistake: Season 5 - Episode 9: My Half-Acre: When JD and Julie have had their old couple photograph, JD takes his mask off and his hair is flat. In the next shot, it is waxed up and styled again.
My Kingdom - S2-E19
Continuity mistake: When J.D. fantasizes about meeting Turk at the dorm for the first time, the shot has been flipped. Look at the signs on the doors. (00:18:30)
Continuity mistake: Dr. Cox's stethoscope is hanging down more on his left side, but when he walks around to J.D. it is now hanging evenly around his neck. (00:21:40)
My Old Lady - S1-E4
Visible crew/equipment: You can see just the tip of the boom mic on top of the frame for 5 seconds, before Dr. Wen tells Turk that he passed the Cooper's ligament three times. (01:18:30)
My Best Friend's Mistake - S1-E3
Audio problem: When Dr. Cox is yelling at Dr. Reed and he's saying, "For the love of Aisha," he's mouthing the word God, but "Aisha" which was dubbed over. (01:02:40)
My Old Friend's New Friend - S4-E1
Continuity mistake: When JD writes 'Al Coholic' on the shifts board and the shot then cuts to Elliot, there is a brief cut back to JD and you can see behind him that his prank name has changed to 'Dr. Ass Face'.
Answer: Dan was drinking beer and Cox feared that Dan might get so intoxicated he would fall asleep and drown in the tub.
Mortug