Down in the valley

“Silicon Valley: The Untold Story” is a lot kinder to California’s high-tech region than the similarly named HBO comedy series, but this documentary’s three-hour running time may be too much even for geeks who think the place is more magical than Disneyland. Apple co-founder Steve Wozniak and WhatsApp CEO Jan Koum are among the talking heads.

7 p.m., Science Channel

Girl power

Lynda Carter may have retired her Wonder Woman tiara decades ago, but she still remembers enough about the iconic TV character to narrate “Epic Warrior Women,” a three-part docu-series celebrating real-life Amazons and other iconic female fighters. The episodes aren’t as flashy as superhero movies, but they’re no less inspirational.

7 p.m., Smithsonian

Memory play

Feature film director Rebecca Miller is known for coaxing great performances out of her hubby, Daniel Day-Lewis, and Oscar nominee Greta Gerwig, but she’s also adept at drawing real emotions out of her dad in “Arthur Miller: Writer.” The documentary covers the late playwright’s classics — “Death of a Salesman,” “A View From the Bridge,” “The Crucible” — but the real draw here is the father-daughter chats that don’t shy away from the legend’s darkest chapters, including the death of his second wife, Marilyn Monroe.

7 p.m., HBO

Neal Justin