The teens return home to find their loved ones and all of Port Lawrence in grave danger.
| Name | Type | Role | |
|---|---|---|---|
| Rob Letterman | Writer | ||
| Nicholas Stoller | Writer | ||
| K. Scott Malcolm | Guest Star | Scout | |
| Laura Mennell | Guest Star | Eliza | |
| Matthew Pohlkamp | Guest Star | Dennis | |
| Rob Huebel | Guest Star | Colin | |
| Lucia Walters | Guest Star | Laura Howard | |
| Chris Geere | Guest Star | Kanduu | |
| Leonard Roberts | Guest Star | Ben | |
| Terry O'Sullivan | Guest Star | Dowling | |
| Dave Beamish | Guest Star | British Soldier | |
| Françoise Yip | Guest Star | Victoria | |
| Gardiner Millar | Guest Star | Rifkin | |
| Olesia Shewchuk | Guest Star | ER Doctor | |
| Aiden Howard | Guest Star | Sam | |
| Paul Rust | Guest Star | Franz Mahar | |
| Lexa Doig | Guest Star | Sarah | |
| David Grossman | Director |