The girls follow Zac to school and attend the biology class. They try to take his powers in middle of classes but fail, so out of frustration Lyla uses her powers to spring some fountain water on Zac to get him wet. They are taken to the principal office where the principal Rita takes the Moon Ring from Sirena claiming that she stole it. Sirena is desperate to get it back and they follow Rita home where they make a discovery.moreless
Lyla, Nixie and Sirena decide to venture mainland to search for Zac and use the Moon Ring to get legs. Zac however is having trouble with his lifeguard duties as he can't touch water without getting a tail.moreless
Mermaid pod of the Mako Island prepare for celebration of the full moon. Three young mermaids (Lyla, Nixie and Sirena) are left to guard the island against intruders. However, they neglect their duties and two human boys end up on the island. One of the boys, Zac, wanders off and forms a bond to Mako when he ends up falling into the Moon Pool while the full moon beams reach the pool. Next day he discovers that by coming contact with water he gets a tail. He also develops the power to control water. The mermaid pod is afraid of their secret coming out, so they decide to leave Mako, casting the three girls out.moreless
In part one of the two-part series finale, the 11th pilgrimage arrives. With the assistance of Lucas and Mira, the Phoenix Group tries to pillage resources from Terra Nova.
In the second part of the two-part series finale, Jim and Taylor fight against the Phoenix Group. A major decision is made regarding the future of Terra Nova after a colonist is forced to make the ultimate sacrifice.moreless
As the arrival of the 11th Pilgrimage draws closer, Lucas forces Skye to run a risky mission so he can complete his device ahead of schedule. However, his race to defeat his father brings about unwanted exposure and redemption of another citizen. Elsewhere, Maddy attempts to use Terra Nova's barter system when the core in her plex fails.moreless
Taylor and Mira fight in the jungle where Taylor learns more about the Sixers' plans as well as information about his son. They must ultimately work together against a prehistoric enemy. Jim receives some information on the Sixer mole and locks down Terra Nova while he tries to catch the traitor. Zoe's Ankylosaur is growing too large, which forces her to make a difficult decision.moreless
Taylor looks for the Sixer mole that Mira sent into Terra Nova. Jim looks into an old murder, for which it looks like Taylor might be guilty.
Maddy's life is in danger after she learns a secret about one of Terra Nova's top scientists. Josh makes a deal to bring Kira back from 2149, which could be trouble for the colony.moreless
All of Terra Nova's technology is wiped out after a meteor crashes. Maddy and Reynolds get stuck outside the walls. Skye and Elisabeth team up to save someone's life. Mira and the Sixers try to attack and Taylor must stop them.moreless
Terra Nova has its first murder, and Jim and Taylor must determine who is guilty of the crime. Meanwhile, Skye continues to help Josh figure out how to get Kira to Terra Nova from 2149. Elisabeth is determined to save an unborn Ankylosaurus after Zoe sees the egg in the hospital and asks if she is going to help it.moreless
When an orphaned Sixer runs away and shows up at Terra Nova looking for help, Shannon and Taylor disagree about whether she can be trusted. Taylor suspects that someone in the camp is a traitor. Meanwhile, Reynolds admits he has feelings for Maddy.moreless
To prevent Terra Nova from being infected, Elisabeth, Jim, Malcolm and Taylor must work together to find a cure when they discover a mysterious virus is causing memory loss, paranoia and death at a nearby outpost. Skye and Josh once again go outside the walls of Terra Nova and run into trouble.moreless
Jim and Taylor find themselves trying to save the colony from an attacking swarm of pterosaurs. Elisabeth discovers a former boyfriend is also living in Terra Nova and Jim is suspicious that he may have been responsible for her being recruited. Skye and Josh spend more time together as she tries to make him feel more comfortable living in Terra Nova. Reynolds begins to look out for Maddy.moreless