Character mistake: In the scene, where Jeanne tells Tony that he never said he loves her, besides after sexual activities. This is not true. In episode 15 "Friends and lovers" Tony ends a phone call saying "I love you."
Continuity mistake: When Tony is moving the furniture, his grip on the items is constantly changing instantly. (00:17:50)
Continuity mistake: When Abby is first discussing the victim's blood types, there is a shot from behind her that shows a black band wrapped around her upper left thigh about an inch below the hem of her skirt. The shot changes to a front view and the black band is gone.
Other mistake: McGee says that Jancy got into her cab at 12:37am and arrived at her destination at 12:55. That's 18 minutes for the taxi to drive "over 20 miles away" Hardly likely given traffic. (00:29:00)
Suggested correction: You missed the point of what he said. The cab ride ends at Gilroy's address, which is 20 miles from Travis Wooten's home. But the ride didn't start at Wooten's home, it started at Feeney's Billiard Club. They don't make any mention how many miles the ride was.
Other mistake: When Ziva signs the will, she signs it with her real name - "Cote" is visible.
Suggested correction: No. We see in the closeup Ziva David writing her name, and the shot cuts away just as she starts to write the last "d" in David (timecode 00:28:00).
Continuity mistake: Right at the end, the dying Poloma reaches up and touches her brother's right cheek. Her bloody fingers leave a trail behind. This disappears in the next shot when Alejandro turns his head to look at Gibbs.
Plot hole: Season 6, episode 8 ("Cloak"). When Ziva and Tony take the elevator two floors down this takes a full minute. When in a hurry for a call it speeds down, yet for this conversation it (conveniently) took a minute.