Continuity mistake: When we see the pupils jumping the pommel horse during the PE lesson, Gripper does his jump and you can see there is a pupil with a dark blue shirt at the back of the queue, but when we see a close-up of the queue in the next shot, there is now a pupil with a light blue shirt at the back. Then when Richard Marks does his jump over the horse the pupil in the light blue shirt has disappeared.
Continuity mistake: At the start of this episode it is raining heavily, but when Cathy drops Alec off there is bright sunshine and the ground is dry even though Alec is still wet. But when the school is out in the playground after the fire alarm has sounded, the ground is wet again.
Continuity mistake: Mr Robson parks his red Vauxhall Cavalier outside the school gates with a blue VW Golf next to it backed up to the fence. When Amy walks in there is a different red Cavalier parked where Robson's car was parked, and the blue Golf has turned round and is now facing the fence.
Continuity mistake: Richard and Matthew are on reception duty, and Richard is hacking into Mr. Hargreaves' computer to see if he can find out what Hargreaves did with the money that was for the trip to Russia. The scene cuts to Mr. Robson's geography class where Justine has a message from Mrs. McCluskey to Fran. Richard and Matthew are seen in this class, but when we cut back to reception Richard and Matthew are still on reception duty.
Continuity mistake: Karen and Tracey are climbing the tree Adrian is behind Tracey, Karen tells Adrian not to come up as there's no room, but when the angle changes to looking down the tree trunk Adrian has disappeared, and less than a minute later Karen and Tracey are back on the ground.
Continuity mistake: In episode 16 Calley takes her boyfriend's works pass out of his wallet - the name on the pass is John Cooke. In this episode when the security staff look at the computer screen to find out whose pass let Calley, Ronnie and Georgina into the animal house, John's surname has changed to Hunter.
Continuity mistake: When Ayeesha and Akik walk into school Mr. Hankin's blue Morris Minor is parked next to a white Ford Escort mark 3 which the Timpson brothers are leaning on. The camera then goes back to Hankin getting out of his car - there is now a white Ford Escort mark 2 next to Hankin's Minor.
Continuity mistake: Mr Mitchell and Carol are in the back seat of the police car looking for Trisha, and when they see her walking home alone they stop to pick her up. In the following scenes of the police car speeding through the streets you can see that Trisha is not in the car, only Carol and Mitchell are in the back seat, but when the police car stops to arrest the man who is following Cathy, Trisha is there again.
Continuity mistake: When Carol meets Trisha at home time at the school's main entrance, behind them you can see two cars parked in front of the school - a black Humber facing the school and a red Vauxhall Victor. When the shot changes to Cathy standing outside the school's front gate you can see the red Victor has gone, the Humber is now parked in the same place but facing away from the school, and a white VW camper has appeared next to it.
Continuity mistake: Just before Gerry, Ruth and Cathy go into the toilets Cathy is standing on the left - the angle changes and Cathy is now standing between Ruth and Gerry. Later on when they ask to go outside to get away from the puddles the three girls are standing close together, the angle changes and they are standing further apart.