So as the season starts 3 months have passed since Tom Mason agreed to go with the alien invaders. Weaver is still in command of the 2nd Mass, while Anne continues to serve as medic. They have seen many battles and are a much leaner unit now. Pope has taken command of the Berserkers, a renegade group within the 2nd Mass that Weaver doesn’t fully trust. When Tom suddenly returns, he is faced with doubt about his loyalties to the group. Meanwhile, Hal and Ben continue to drift apart as Ben challenges his older brother’s authority. Tom is still haunted by memories of his time with the aliens and begins to wonder if they did something to his mind. Pope, who is in charge of questioning Tom, plants seeds of doubt about him among the group. Meanwhile, Ben’s hatred for skitters grows, and the 2nd Mass scouts locate an old bridge that will help them cross the river to safety ahead of an impending attack.
The 2nd Mass moves into an airport hanger, but the drafty conditions cause Anne to grow concerned about the group’s health. Meanwhile, the Berserkers hatch a plan to get rid of Tom. While dealing with the loss of one of their own, the 2nd Mass receives a promise of hope from a visitor travelling by plane. While on patrol together, Ben and Hal try to help a young boy and wind up having their bikes stolen. The hunt to recover them leads them to the discovery of something much bigger. Also, Matt is put in danger, and Weaver is reunited with a family member. A familiar face returns to the 2nd Mass, but his intentions remain unknown. Meanwhile, a skitter is captured and brought back to the camp as a prisoner. Hal bonds with Maggie as she begins to open up about her past. Hal stumbles across corpses of de-harnessed kids, among them Karen, alive.
Tom and Anne grow closer. Weaver’s health deteriorates just as Tom discovers he may have been keeping important matters from the group in order to protect them. Karen leads Ben into a trap so the Overlord can find out about the Skitter Resistance movement. The trap fails and the 2nd Mass manages to capture the Overlord. In an attempt to free the Overlord Karen uses a new type of alien creature. The 2nd Mass pushes on to Charleston. Weaver learns more about Tector’s background from before the invasion. Hal learns about Maggie’s “dark” past. The 2nd Mass arrives in Charleston where Tom comes across his former mentor and professor Arthur Manchester. Their arrival brings existing tensions to show and the situation escalates fast. A group of renegade skitters approaches Charleston to present a unique option to hurt the enemy by assassinating the overlord. In the end it is up to the 2nd Mass to use it, after Charleston military betrays them. The overlord dies but Karen escapes after infecting Hal. Tom finds out Anne is pregnant with his child. The episode ends with the arrival of a mysterious new species of aliens who suddenly arrive on earth in their awesome spaceships but we have no clue as to whether they are friend or foe?
This season sees some loss, some more deaths and shows that not every creature can be judges by what they seem to be – the renegade skitters was a nice touch and the choice of Ben to initially stay with them was a great move. The situation at the base in Charleston shows that in toughest situations, some people get comfortable with what resources they have and will be reluctant to push forward and take risks. I though the episodes at the base were the best so far. Can’t wait for season 3 to start.