Continuity mistake: When attaching the arms during surgery, they show the same arm with the tattoo "Nicole" pink up twice instead of showing both arms.
Character mistake: When talking to a family, Christina says that the patient had "hematomachrosis" instead of "hemachromatosis"
Factual error: At the end they land at Sioux Falls Airport or "Joe Foss Field" but the shuttle says "Joe Boss Field".
Continuity mistake: You see Karev in the elevator with O'Malley putting on OR scrubs, in the next scene Karev isn't wearing his but a few shots later he is. Karev is wearing gloves, yet we don't see him putting them on.
We Are Never Ever Getting Back Together - S10-E22
Other mistake: When Meredith is talking to Kenzie about the conjoined twins, she is wearing a lab coat that says Seattle Grace Mercy West. The hospital is named Grey Sloan Memorial at this point. (00:20:00 - 00:21:00)
Continuity mistake: Meredith takes over injecting George for Alex, and right after she stands behind George, Alex leaves. Just when he opens the door, suddenly you can see Alex is behind George and Meredith is just coming in again. (00:19:55 - 00:20:50)
Visible crew/equipment: When Burke steps onto the elevator Miranda declines his offer to scrub in on the GSW, and just as Miranda admits to having a "date" that evening, a T-mark can be seen on the floor in front of Burke. (00:10:40)
Superfreak - S7-E3
Character mistake: When Meredith adds Amy's name to the board for Derek's surgery she spells Amy's last name differently than Derek's.
Crazy Love - S11-E19
Visible crew/equipment: You can see the camera recording in the glass when panning over Arizona.
(As We Know It) (Part II) - S2-E18
Visible crew/equipment: When Meredith is walking away from Thatcher's house, there is a crew member that is between the house and mailbox who slips into the shadows. (00:33:12)
Revealing mistake: When Ray is panicking over being in the rig with his dead partner, Stan, and turns to look at Meredith, you can see Stan's eyelashes flutter as he blinks. (00:36:37)
There's No 'I' In Team - S5-E5
Continuity mistake: Lexie Grey hangs sign on George's new locker, in the next shot it disappears. (00:04:37)
With a Little Help from My Friends - S18-E4
Visible crew/equipment: When Hunt and Hayes decide to get a drink at Joe's after work it then cuts to Schmitt standing at the doorway, and the blue T-mark is visible on the floor just as Kim joins Schmitt. (00:39:20)
Visible crew/equipment: When Teddy and Amelia walk over to Koracick he gives Amelia the boy's tumor diagnosis, and as Amelia walks into the patient's room the red T-mark is visible on the floor, at the bottom, left side of the screen. (00:15:10)
A Hard Pill to Swallow - S16-E11
Visible crew/equipment: After Hayes asks Meredith if she knows Dr. Yang she avoids an answer and walks away, then when it cuts to Bailey as she walks toward Koracick, three tape marks (two red, one blue) are visible on the floor near Koracick. (00:36:30)
Visible crew/equipment: After Derek tells Cristina that her patient is paralyzed, when it cuts to the ICU as Cristina talks to the man's wife, the pink T-mark becomes visible on the floor at the bottom of the screen, near the right side. (00:02:05)
Visible crew/equipment: At the start, when Jackson and Maggie react to the fire alarm, just as Maggie says, "All right fine. It's the guy. The bad, escaped rapist guy," the white T-mark is visible on the floor, before she stands up. (00:00:35)
Could We Start Again, Please? - S11-E7
Visible crew/equipment: In the ER, when they move Hattie off Norris he grabs hold of her hand, and two shots later in the closeup as Norris lets go of Hattie's hand, the white T-mark is visible on the floor. (00:04:55)
Hook, Line and Sinner - S6-E20
Visible crew/equipment: Lights, a camera, etc. are visible in the reflection of the helicopter medic's helmet. (00:08:45)
Continuity mistake: Addison removes her glasses twice from one shot to the next, when she is talking to Preston Burke.