Primeval

Season 4, Episode 3

Episode Title: Lockdown

Air Date: 2011-01-06

Overview:

When an Anomaly opens at a theatre, a group of mysterious Anomaly travellers come through, followed by fast and deadly Tree Creepers. Meanwhile, Connor helps Philip design a new security system for the ARC, but it goes horribly awry and sends the ARC into lockdown, and time is running out for Connor to free Rex and Philip before the system suffocates them.