Ellen Gray's weekend TV picks
* GAME OF THRONES. 9 p.m. Sunday, HBO.
The stakes are as big as ever (and the dragons bigger) as television's most ambitious drama returns for a fourth season.
* SILICON VALLEY. 10 p.m. Sunday, HBO.
Mike Judge ("Beavis and Butt-head," "King of the Hill") taps into his programming past for this smart, funny live-action series about a timid geek (Thomas Middleditch) who'll have to learn to swim with sharks if he's going to bring his Big Idea to market.
* VEEP. 10:30 p.m. Sunday, HBO.
With the never-seen president out of the running, Vice President Selina Meyer (Julia Louis-Dreyfus) is gearing up for another presidential race, beginning with a book tour for the autobiography she didn't actually write. Look for a disruptive new role for White House liaison Jonah Ryan (Timothy Simons) this season.
* TURN. 9 p.m. Sunday, AMC.
This new drama about a Revolutionary War spy ring that helped George Washington beat the British kicks off with a 90-minute episode.
* THE WALTONS. 1 p.m. to 7:30 p.m. Sunday, INSP TV.
If you've ever wondered what "Waltons" creator and narrator Earl Hamner Jr. looks like, here's a chance to see. The 90-year-old writer was interviewed by the Inspiration Network about his favorite episodes, which will air along with his thoughts about them.