Primeval
Episode 4
S4 E4:
Saturday detention is chaos when a deadly Therocephalian attacks a teacher, allowing the kids to run riot. The team are faced with not only tracking down the creatures, but fighting against the antics of a group of terrified students. Finding a Therocephalian nest in the school, Connor enlists the help of the kids to help defeat the creatures before returning them through the anomaly.
Starring
Ciarán McMenamin, Alexander Siddig, Ruth Kearney