Thursday, Jan. 3, CBC, 8 p.m.
Experts reveal the truth about what's lurking beneath Yellowstone National Park in this premiere documentary. Situated on top of one of the Earth's largest volcanic systems, it's due for an eruption. Experts explore the fallout of such a catastrophe. CBC, 8 p.m.
Person of Interest
Thursday, Jan. 3, CBS/Citytv, 8 p.m.
Jim Caviezel continues his role as a former CIA agent turned vigilante in this critically acclaimed drama. Using his special training in covert operations, Reese works with an eccentric billionaire to stop violent crimes before they happen.
Sunday, Jan. 6, PBS, 9 p.m.
The war is over, but intrigue and drama still grip the titular estate in Season 3 of the popular British series -- not to mention romance, as fans get to see the wedding between Lady Mary (Michelle Dockery) and Matthew Crawley (Dan Stevens). Shirley MacLaine guest stars.