• Josh Brolin narrates the crazily ambitious “Mankind: The Story of All of Us,”a 12-part miniseries covering the entire history of the human race. Sounds like a laborious homework assignment to us.10 p.m., History.

• We’ve learned our lesson: Never watch “Parenthood”without a box of industrial-strength tissues at hand. Tonight’s episode finds Adam and Kristina (Peter Krause, Monica Potter) trying to juggle the demands of daily life with her breast-cancer treatment.9:01 p.m., NBC.