Primeval (2007)

S04E03 Lockdown

An Anomaly suddenly appears at a theater, allowing a band of enigmatic travelers to emerge, closely pursued by swift and lethal Tree Creepers. Concurrently, Connor assists Philip in creating an advanced security system for the ARC, but things take a disastrous turn, locking down the facility. As time ticks away, Connor races against the clock to rescue Rex and Philip before the malfunctioning system puts their lives in jeopardy.