WEEKEND TV: A look at Planet Earth Saturday’s must see is Planet Earth II, the sequel to the award-winning series from a decade ago. Check out this story on thecalifornian.com: http://bit.ly/2lt3AFf SATURDAY’S MUST’-SEE: “Planet Earth II” debut, 9 p.m., AMC, BBC America and Sundance; also, 6 p.m. on BBC America.