After a year in the Cretaceous period, Abby and Conner escape back to present day in the Season 4 opener. They are greeted by a new ARC team, and find out that their jobs may be in jeopardy after being away for so long. (TV Guide)

Connor reunites with an old friend and is surprised to learn he's obsessed with creature sightings. The pair track down an elusive boar crocodile that's been terrorizing the docks and they find evidence of a fresh kill. (TV Guide)

An anomaly in a theater brings forth a mysterious group who were unknowingly followed by deadly tree creatures. (TV Guide)

Students in Saturday detention are in for a surprise when a vicious therocephalian gets loose in their school. (TV Guide)

Strange anomaly signals appear in a small coastal town, so Abby and Connor head there to investigate, and while there, they come across a deadly labyrinthodont. Elsewhere, Matt searches for the missing Emily. (TV Guide)

The team stumbles upon a wedding while investigating an anomaly, and the bride is none other than ex-ARC member Jenny Lewis (Lucy Brown). The big day is jeopardized when a family of hyaenodons crashes the party. (TV Guide)

Danny appears from the Rift Valley, and he comes with a warning for the team. (TV Guide)