Factual error: In the episode 'I Only Have Eyes For You', during the flashbacks to 1955 James and Grace dance, and James later shoots himself, to the song 'I Only Have Eyes For You', which wasn't released until 1959.

Continuity: When Giles is giving his speech about the Hellmouth the books Buffy's holding keep changing from facing him to facing Buffy and back again.

Revealing: During the fight scene at the end when Buffy is fighting the demons you see her throw one of the demons off the platform. If you watch him fall you can see him land safely on a conveniently placed mat.

Continuity: Willow is turned into a ghost. Throughout the entire episode, she can't touch anything (can't turn the pages of a book, etc.), yet towards the end when she and Giles go to Ethan's shop, and she leaves, you can hear that she opened and closed the door, even though she can walk through walls and can't actually touch the door. The curtain moves when she leaves too.

Continuity: Sunnydale apparently has docks ('Consequences' and 'Surprise') and is quite close to a beach ('Go Fish'), but when Sunnydale is destroyed in 'Chosen', we see an overhead shot of the crater and it appears to be in the middle of the desert, far from any coastline.

Factual error: In Teacher's Pet, Doctor Gregory was giving the class a lecture about ants. But he projects an image of a beetle onto the wall behind him.

Continuity: In the season two episode "When she was bad", Joyce is driving Buffy to school and she is wearing a pink tank top. At school that day her shirt is white, but the next day at school she is back to wearing the pink outfit.

Continuity: In episode 'Same Place, Same Time', Gnarl cuts Dawn across the stomach paralysing her and ripping her shirt, but when Buffy and Xander are carying her home there is no tear in her shirt or any blood. Also when Buffy goes back to kill Gnarl he tears her shirt but seconds later the rip has gone.

Continuity: In the last episode of Season 5 we see Spike thrown off the tower by Doc. Spike somehow manages to change from black trousers and boots into blue jeans and white shoes mid-air. He's back in black by the time he hits the ground.

Continuity: From the start of the second scene in the Magic Box, the doughnut and cruller on Xander's plate constantly switch places.

Continuity: Buffy's birthdate starts at 1979. In "I Robot, You Jane", when the demon pulls up Buffy's file in the school system, it shows her year of birth as 1979 and that she is a senior. But when her file comes up on the student's computer screen, its changed to 1980 and sophomore. It wasn't until towards the end of season 1 in "Nightmares" that her birth year is 1981 (on her tombstone before she comes out as a vampire.)

Visible crew/equipment: In the episode 'This Year's Girl', when the Scoobies find the demon in the woods that Adam has cut open you can see a boom mike operator in the background.

Continuity: While studying at the Bronze, Buffy and Willow leave their books on the table to go and dance. Spike calls them outside to fight a vampire, and when Xander runs back inside to grab a stake the books have all been put back into Buffy's bag.

Continuity: In episode 'Anne', when fighting the hell dimension demons Buffy's shoes change from trainers to plain pumps in different shots.

Continuity: In the episode 'Angel', during the climax at the Bronze Buffy puts down her crossbow and walks towards Angel, about 5 steps. When Darla bursts in a few seconds later the crossbow is back at her feet.

Plot hole: The First (as Drusilla) touches and moves Spike's hair, However it is made very well clear later in the season that The First is not corporeal, which means it is unable to physically touch anything.

Revealing: When Buffy is invisible and in the social office in "Gone", she is searching for the summer files, and you can see a thumb picking them up.

Continuity: In "the pack" nearly all the supposed video clips of hyenas Willow watches on her computer monitor throughout the episode are actually of African wild dogs.

Continuity: In the episode 'Killed By Death', when Buffy looks into the childrens' ward the sign on the door saying 'Basement Access' disappears and reappears between shots.

Revealing: When Buffy finds Faith and the Potentials in the sewers she throws an Ubervamp across the room. When we see the Ubervamp from behind you can also see the actor's blue boxer shorts sticking out of the Ubervamp costume.