Xander opens a window in Buffy’s house so he can get in to let Cordelia in, but when Cordy goes through to the living room, the window is closed.

Angel’s stunt double can clearly be seen - he has much bigger hair than Angel’s.

When Buffy lies down on Angel’s bed, she tucks both hands up near her face, but in the next shot she’s just moving one hand from her knee to her face.

Buffy leaves the school in broad daylight but gets home at night. She can’t have been wandering the streets as she is nervous of meeting the Order of Taraka - so where did the time go?

Buffy slashes the assassin’s throat but there’s no blood on her ice skate. In fact, there’s no blood at all, considering the assassin bled to death.

When the one-eyed assassin gets off the bus the colour of the steps changes from grey to red in different shots.

When Buffy climbs in her window to find Angel in her bedroom, her window-shade is up but when they talk about her love of ice skating, it’s down.

Angel’s reflection is briefly seen in a frame in Buffy’s room, above the blue light.

Vampires are supposed to have excellent vision so why does the vampire Dalton need glasses?

Paige played the werewolf Veruca. She appeared with Seth Green previously in the 1998 film Can’t Hardly Wait. Paige has also been in The Ranch, It’s All Relative, Beverly Hills, 90210, Hercules: The Legendary Journeys, ER, The Ranch, Diagnosis Murder and ‘The Muffin Tops’ episode of Seinfeld.

Dagney Kerr played Buffy’s college room mate Kathy Newman in The Freshman and Living Conditions. She has also been in Two Weeks Later, One Man’s Trash, Six Feet Under and George Lopez. Her real name is Michelle Kear. Dagney is an instructor in the Windor Pilates videos.

Adam Kaufman played the slimy Parker Abrams in season four. Adam has also starred in Steven Spielberg’s Taken as Charlie Keys (alongside Julie Benz, who plays Darla). He played Ethan in several episodes of Dawson’s Creek. Adam has appeared in CSI:Miami, Dead Last, Law & Order and Metropolis.

Phina played Giles’s on-off girlfriend Olivia in season four. She appeared in the episodes The Freshman, Hush and Restless. Phina and Anthony Stewart Head were in acting class together in the past and he suggested her for the role in Buffy. Phina has also appeared in The Forsaken, How Stella …

Katharine played the vampire Sunday in The Freshman. She has also been in Easy Six, Scream at the Sound of the Beep, The Anarchist Cookbook, Evolution, Mulholland Drive, Go, What Lies Beneath, But I’m a Cheerleader and The In Crowd. Katharine had a cameo in She’s All That, as did …

Channon played Jack O’Toole in The Zeppo. He can be seen with Seth Green in the movie Can’t Hardly Wait, and with Nicholas Brendon again in the 2000 movie Psycho Beach Party. He played a surfer in Boogie Nights and has been in episodes of Charmed, Diagnosis Murder, NYPD Blue, …