Buffy arrives home in full daylight and Willow says, “Buffy, we just got news”. They go into the dining room where Willow explains about the new potential - but it’s suddenly night time in there.

When the Turok-Han chokes Buffy and she pulls the arrow from his neck to stab him in the eye, you can see that the arrow is still in her hand and the Turok-Han had a copy of it and put in his eye.

When the Turok-Han enters the house, Buffy isn’t wearing a coat. Then she and the others run outside, where she’s suddenly wearing a fully buttoned jacket.

When Anya persuades the demon to open the portal, she says the demon has six spleens. We then see a shot of Giles and Anya, where Anya’s lips move even though she’s finished her sentence. This also happens later in the scene.

In the beginning of the episode, Eve/First is lying covered with a blanket - the First can’t touch anything. In fact, how did the First avoid touching anything when it lived in the house for two days?

Annabelle’s dead body moves positions in different shots after Buffy fights the Turok-Han.

Xander spends ages making the house safe by boarding up the window in the living room - but the other windows and doors in the house clearly haven’t been boarded up.

Buffy mentions in Bring On the Night that it is December. If this is true, the time frame between Conversations with Dead People (which was set on November 12th) and this episode would be at least 18 days. We know, though, that hardly any time has passed since Conversations With …

When the Scoobies first see the Seal, Dawn’s hair suddenly goes from being straight to curly when she says, “There’s blood on this… lots.”

We see the Watcher’s Council Headquarters twice in Never Leave Me, but the two shots show what seem to be completely different buildings.

When Willow confronts Andrew, her hair at the back of her head moves in different shots, without her touching it.

Why did all the new vampires rise at the exact same time? They were sired over a period of several days.

When Willow says to Buffy, “But Dawn actually saw your mother”, Buffy suddenly moves from standing to leaning on a wall.

When Dawn has cast the demon out, her mouth and lips are covered with blood. The blood disappears in the next scene.

When Jonathan and Andrew are talking on the walkie-talkies, the light from a torch is shining on Jonathan, yet Andrew never points his torch toward Jonathan.