MINISERIES. This extraordinary miniseries from the people behind "Planet Earth" captures never-before-seen footage of life at the polar regions — like video of the underwater brinicle, known as the 'icy finger of death,' which kills everything it touches — as well as breathtaking landscapes that may not be seen much longer if climate change has its way. Alec Baldwin narrates.
Series premiere, Sunday, 8 p.m., Discovery Channel
"The Walking Dead"
DRAMA. One shocking death last week led to an even more disturbing discovery about zombies which leads to tonight's WTF season finale.
Season finale, Sunday, 9 p.m., AMC
DRAMA. Sarah Shahi is back as spunky legal mediator Kate, who is still fighting with the stepmom who took over her dad's law firm and just can't get over her ADA ex-husband (played by Michael Trucco — can you blame her?). Maybe she'll have better luck in both her professional and private lives when she goes toe-toe with a trial lawyer (new series regular Ryan Johnson).
Season premiere, Friday, 9 p.m., USA
MOVIE. Syfy is at its B-movie best with this campy tale of a murderous leprechaun who is exacting revenge after — you guessed it — his pot of gold is stolen.
Saturday, 9 p.m., Syfy