Character mistake: When talking to a family, Christina says that the patient had "hematomachrosis" instead of "hemachromatosis"
Continuity mistake: Izzie's glasses disappear from her face when the interns are getting the gurney from the airpad. (00:05:25)
The Self Destruct Button - S1-E7
Visible crew/equipment: When they arrive at work near the beginning, as Meredith exits the car, and walks past, the boom mike is reflected in the car, in front of her, following her along. (00:02:45)
The First Cut Is the Deepest - S1-E2
Continuity mistake: When Meredith drops all the files in the elevator to make out with Derek, they are in a different position from when she picks them up.
Continuity mistake: When Meredith is trying to give George the shot of Penicillin the gloves on her hands suddenly appear in one shot. (00:20:00)
Winning a Battle, Losing the War - S1-E3
Continuity mistake: Viper has a green headband on with a white bandage underneath. But as he leaves, then kisses Meredith, the bandage has vanished. (00:10:45)
Continuity mistake: George puts his stethoscope on twice, while everybody is getting ready in the locker room. (00:03:35)
Winning a Battle, Losing the War - S1-E3
Continuity mistake: When Christina is talking to Shelley about allowing her husbands organs to be donored, the girls crayons on the desk keep changing position. (00:27:30)
The First Cut Is the Deepest - S1-E2
Continuity mistake: When Meredith and Derek are at the elevator, Derek is on a palm pilot. Between shots, he closes it twice. (00:41:30)
The First Cut Is the Deepest - S1-E2
Continuity mistake: When Meredith is walking over to the beds, the cooler and packet of crisps that she is holding swap hands between shots. (00:24:35)
Continuity mistake: When Derek comes out of surgery he removes his hat. In the next shot it's back on. (00:40:05)
Visible crew/equipment: When Meredith is asking Dr. Bailey for Derek, a cameraman is reflected in the glass panels beside them. (00:10:50)
Winning a Battle, Losing the War - S1-E3
Continuity mistake: When Christina is talking to Shelley about her husbands organs, the clipboards on the table in front of her keep changing their positions. (00:28:25)
The First Cut Is the Deepest - S1-E2
Continuity mistake: After George finishes brushing his teeth, he has a smear of toothpaste left on his cheek which disappears between shots. (00:34:10)
Continuity mistake: When the interns are sitting on the beds, Izzie stretches her arms upwards twice between shots, when talking about geriatrics. (00:15:50)
Continuity mistake: When George is telling Gloria that her husband died, the woman standing next to Gloria puts her hand on her shoulder three times. (00:33:20)
Continuity mistake: Dr. Bailey points out four pagers for the four interns. However somehow there are two pagers left over. (00:04:30)
Continuity mistake: Christina turns her head away twice, when Meredith is picked for surgery with Derek. (00:29:55)
Winning a Battle, Losing the War - S1-E3
Continuity mistake: When the interns are asked who wants to assist Burke, everyone raises their hands. When they lower them, Christina lowers her arm twice. (00:03:10)
Continuity mistake: Just before Meredith answers the question about the "common causes of post-op fever", her file opens itself between shots. (00:36:00)