Shot over a series of four years, the documentary “The Last Ice” (Nat Geo Wild, 9 p.m.) shows the rapid disappearance of Arctic ice between Canada and Greenland and especially its effect on the Inuit population. 

The new film on “POV” (PBS, 10 p.m.), “Softie,” follows the journey of a Kenyan activist who decides to run for office.

The National League Championship Series begins with Atlanta vs. Dodgers (Fox, 8 p.m.) from Arlington, Texas. Earlier is Game 2 of the ALCS with Houston vs. Tampa Bay (TBS, 4 p.m.).

The fourth season of the revived “One Day at a Time” (CBS, 9 p.m.) begins on broadcast TV with a couple of episodes.

Sonya Cassidy (“Lodge 49”) and David Costabile (“Billions”) are in tonight’s episode of “Soulmates” (AMC, 10 p.m.).

Islanders prepare for fateful birth on “The Third Day” (HBO, 9 p.m.).

On “We Are Who We Are” (HBO, 10 p.m.), Sarah an Richard escalate their rift.

How fast are they trying to fill a Supreme Court vacancy? By beginning the Senate Nomination Hearing (CSPAN, 9 a.m.) on a Federal Holiday.