The Tyrant - S6-E3
Continuity mistake: In the scene where the patient is having a heart attack, Dr Cameron is shown on the phone to House with dark hair despite having had blonde hair since season 4. She has blonde hair again in the following scene. (00:10:30 - 00:11:30)
Charity Case - S8-E3
Continuity mistake: House is in the cafeteria eating chips with Adams discussing a case. Park walks up and gives Adams a cup of coffee. The cup of coffee disappears and reappears during the whole scene. The coffee is in front of Adams, then isn't. Towards the end the coffee is far to the side rather than where it originally was set. (00:17:10 - 00:18:45)
TB or Not TB - S2-E4
Continuity mistake: When Dr. Cameron is walking with Dr. Charles to go for a procedure, he barely has any facial hair before they enter the stairwell, but once they reach the stairwell his facial hair has increased quite a bit. His hair is also parted to the left prior to entering the stairwell and once in the stairwell it is parted on both sides.
Continuity mistake: In the last scene where Wilson is in House's office talking about Cuddy, the tennis ball on House's desk continuously changes position between shots.
Revealing mistake: When Park is taking pictures of Adam's cleavage, the camera is turned off. The lens is retracted into the camera.
Continuity mistake: When Cameron apologizes to Chase at the coffee machine, Chase's hair goes from in and out of his left eye between shots without him touching it.
Continuity mistake: A third of the way into the show when Hadley and House are arguing while walking out of House's office, Hadley's necklace watch is backwards and out of the top of her blouse. When they stop walking and switched to a shot of House then back to Hadley, her necklace watch is right-side front and inside the top of her blouse.
Other mistake: When Kate asks House about his insomnia, he reacts by turning to look at her, except that he is now holding the computer in front of him and should be looking there to look at her, not at the coffee table. (00:17:46)
Transplant - S8-E2
Character mistake: While talking to a patient awaiting a lung Transplant, Wilson comments that there is no urine in the catheter bag "despite taking in 200 cc of fluids." I suspect that Wilson meant to say 'despite taking in 2000 cc of fluids' as it would take more than 7 fluid ounces of intake (without noticeable output) before a doctor would begin to worry about decreasing kidney function. A minimum urine output of 30cc/hr is expected for a 70 kg human at a maintenance IV rate of 25-30 ml/kg/day (~73-88 cc/hr). (00:16:01)
Character mistake: When reviewing the results of the mercury testing on a patient, Dr. Taub says "Test results - Surprise, Surprise, Marcus Webly was wrong". The character to which Taub referred was actually Marcus Welby of 1969-1976 TV fame. (00:08:14)
Character mistake: After the differential, House instructs his team to start the patient on "Fluoroquinolone." A fluoroquinolone is a type of drug, not a drug itself. (00:04:58)
Factual error: House makes a person have a seizure by switching the light on and off. This would not cause a person to have seizure as it takes more flickering than that to trigger a seizure in people with photosensitive epilepsy.
Factual error: The boy plays a game of chess at a tournament against some other person. The camera only shows a few pictures of the board, however, when the boy says "goodbye" and the game ends, due to an allegedly checkmate, the following is shown: the opponents king is on f7, with his own figures all around but e8 and h7-9 being free. On h5 is the boy's rook which attacks the h7, h8 and h9 fields. Now the boy moves his bishop to h6, thus attacks f7 (where the king is) and e8 (the only free spot but h6-8). Now of course h6, f7 and e8 are not available to the king anymore, but as the bishop blocks the rooks attack on the h-line, the king now has the fields h7 and h8 to go to. Thus it's by no means "checkmate." (00:01:00)
Factual error: When Dr. House is in the treatment room with a patient that has a gunshot wound to his foot, he removes a bloody dressing and treats the area without wearing gloves. No health professional would do this.
Continuity mistake: During the scene in which House is offering up liquor-flavored ice cream he sets the containers in a row down the table 1-2-3-4-5. He then puts spoons in the three containers closet to Foreman, 1-2-3. The shot changes and before anyone touches the spoons they are now in containers 1, 2, and 4.
Continuity mistake: After Amber hangs up after trying to call House, the angle changes and suddenly her phone is nowhere to be seen.
Character mistake: The chef at the beginning is talking about mustard greens, but is actually holding up broccoli.

Here Kitty - S5-E18
Continuity mistake: Series 5, Episode 18, "Here Kitty": When Judy (the patient) holds the tape out for House before her bronchial attack, the way she holds it changes instantly. (00:13:45)
Answer: She would have No Reason to know it belonged to the CIA. If she did know he went off in the helicopter, all she would know is that it wasn't an ambulance helicopter.
Greg Dwyer