Frustrated by her inability to remember what happened the night Rosa died, Isobel turns to Liz for help regaining her memories. Elsewhere, Max and Cameron investigate a series of strange deaths in the town, while Sheriff Valenti reveals information to Kyle about his father.

When a major revelation comes to light, Max, Michael and Isobel clash over how to deal with the fallout. Elsewhere, Alex uncovers a secret about Project Shepard and enlists Kyle and Michael’s help looking into it.

Max and Michael find themselves at an impasse over how to deal with the 4th alien. Liz has a dangerous encounter with an unexpected visitor. Kyle spirals after uncovering a dark secret about his father’s death. And Michael is forced to make a difficult decision about his future.