In the two-hour season finale, the 11th Pilgrimage arrives in Terra Nova and the mysterious Phoenix Group in 2149 makes its move to pillage the past with the help of Lucas (Ashley Zukerman) and Mira (Christine Adams).

Meanwhile, Jim (Jason O'Mara) and Taylor (Stephen Lang) team up in a last stand against the Phoenix Group, a colonist makes the ultimate sacrifice and a decision is made that will change life in Terra Nova forever in the all-new Occupation/Resistance episode of Terra Nova airing Monday, Dec. 19 (8:00-10:00 PM ET/PT) on Fox.

Terra Nova fans can now watch an 8-minute sneak preview of Occupation/Resistance by liking the official Facebook page. You can also check out the clip below.