A vicious underground creature brings chaos to the city, and the team must race against time to track its movements and prevent it from causing more damage.
Faced with the increasing dangers of Philip's machine, the team are pitted against their darkest challenge yet as Matt's prediction appears to be true.
Matt inadvertently brings back one of a mysterious group which comes through an anomaly followed by deadly tree creatures.
After finding a lost anomaly device in a raptor's bower Abby and Connor finally escape back to their own time.
The ARC team are called after a nuclear submarine encounters an anomaly and a Liopleurodon in the sea.
