Continuity mistake: When Booth is sleeping at the very start his head changes place on his hands. (00:00:40)
Continuity mistake: When the British police woman is saying what jurisdiction Booth will have, his shirt lapel goes from unobstructed to folded over. (00:05:30)
Continuity mistake: When Booth is freaking out about a cup of coffee while stood in the middle of the roundabout, 2 cars pass him. Camera cuts and the second car is going past again. (00:15:20)
Continuity mistake: When Bones asks Booth what he's got from Scotland Yard, the handle on the striped bag goes from outside to inside the bag. (00:01:30)
Continuity mistake: Booth gets a bobble-head bobbie and holds it with two hands. However, in one rear shot he is holding him with one hand. (00:01:30)
Factual error: Dr. Wexler is killed in his flat in Oxford, yet the the fire engine outside his property is marked as being from the London Fire Brigade rather than the Oxfordshire Fire and Rescue Service. (00:04:20)
Continuity mistake: When Hodgins is thrown into the back of the bin lorry the position of the blue bag changes between shots. (00:24:10)
Continuity mistake: When Booth is handed the Walther PPK the Brit has both her hands on the box. When the shot changes she has one hand on her pint. (00:26:40)
Other mistake: Early in the episode, when the body from the outhouse is in the lab, the gang are all wearing bio-hazard suits. Sweets' suit has an opening along the rear-left section of the facemask - perhaps 3" long, and a half-inch high - making the point of the suit completely useless. (00:05:10)
The Finger in the Nest - S4-E4
Character mistake: Hodgins discovers sap from a Japanese cherry tree on the bone from the nest. When the new graduate assistant suggests that it is one of the cherry trees at the Jefferson Memorial, Hodgins is skeptical of the information. In reality everyone who has lived in DC knows about the Japanese cherry trees at the memorial. They have an entire festival attributed to it every year and it practically shuts down the city with tourists. Hodgins should have known about the trees to begin with. (00:01:45)
The Finger in the Nest - S4-E4
Continuity mistake: Booth asks to hear Schatz bark, the owners hand moves from petting the dog to in his lap holding the chain between shots. (00:11:10)
The Finger in the Nest - S4-E4
Visible crew/equipment: After Hodgins examines the victim's car at the FBI, the next scene has Booth's truck driving down a country road, passing the camera in a close-up. As it passes the camera, reflected in the door is the cameraman's torso & arm. (00:14:30)
The Finger in the Nest - S4-E4
Continuity mistake: Bones throws the blue ball for Gladys and has her hands down by her waist. Camera changes and one hand is now up by her head. (00:17:30)
The Finger in the Nest - S4-E4
Continuity mistake: When Hodgins and the intern are discussing the car Hodgins purchased as a kid, Hodgins has his right arm scooping stuff into his sieve. Camera changes and now he is sifting through the stuff with his left hand. (00:28:20)
The Perfect Pieces in the Purple Pond - S4-E5
Continuity mistake: At the start we see 2 or 3 bits floating in the purple section of the water, camera changes to a long shot and only 1 piece is in the purple now. (00:01:00)
The Perfect Pieces in the Purple Pond - S4-E5
Continuity mistake: The mud patterns on the therapist's chest change position after Ralph has run out. (00:16:30)
The Perfect Pieces in the Purple Pond - S4-E5
Continuity mistake: Bones tests some liquid to determine if blood is present. She uses about 2" in the test tube. The result shows a pink hue, not red. The camera angle changes, and now there's only about 1" in the tube, and it is red, not pink. (00:31:10)
The Crank in the Shaft - S4-E6
Continuity mistake: Bones walks onto the lab platform - first, there's no beep from the card reader, and second, she comes up on the wrong side of the steps, where there is no card reader anyway. The mistake is that the production team seems to have completely forgotten about the requirement for card access to that platform. They've had card access required since Season 1; anytime someone doesn't swipe their card, alarms go off. (00:26:00)
The Crank in the Shaft - S4-E6
Continuity mistake: At the end, the female suspect has her hand flat on the table in the interview room. Camera changes to a long shot and now her hand is clenched into a fist. (00:38:10)
Character mistake: Bones tells Cam she isn't able to ascertain sex of the victim due to no pelvic bone. However numerous times in the show she is able to confirm sex with just the skull. What's different here? (00:03:00)
Suggested correction: Maybe this skull was more ambiguous than the others. Unless she said it in a way that suggests you generally can't determine sex from a skull, I don't see it as a mistake. (I only watched the German version where it sounded neutral.)
