1) “The Walking Dead,” 9 p.m., AMC, rerunning at 11:04 p.m. and 1:08 a.m. “Our real enemy is outside,” someone argues. That’s an understatement. Outside Alexandria’s make-shift walls, there are zombies and “Whisperers,” pretending to be zombies. But inside, more hatred builds. It’s aimed at young Lydia, who was once (shown here a Whisperer with her parents; and it’s aimed at her friend Negan, former head of the evil Saviors. It’s a strong, tense hour, spiced with moments of high-octane action.
2) “Masterpiece: The Durrells in Corfu,” 8 p.m., PBS. When the British king visited – in “Upstairs, Downstairs” and then in the “Downton Abbey” movie – things were kind of prompt and precise. But now the Greek king is visiting this island; chaos ensues. There are funny moments here, alongside crises: With Hitler menacing Greece, Margo is rushing home to be with her family. And a week before the series finale, the possible Louisa/Spiros romance faces new trouble.
3) Sports collision. This is the one day when baseball and pro football collide. For football, NBC has the Green Bay Packers (6-1) at the KansasiCity Chiefs (5-2). For baseball, it’s game five of the World Series, with the Houston Astros at the Washington Nationals. The first pitch is 8:07 p.m. ET, kick-off is 8:20; be prepared to switch channels.
4) “NCIS: Los Angeles,” 9 p.m., CBS. An art-theft case gains fresh importance after online chatter: The painting is worth $40 million and would be used to fund terrorism.
5) “Mrs. Fletcher” debut, 10:30 p.m., HBO. Last Sunday, HBO debuted “Watchmen,” with its bizarre mix of rage, fantasy, violence and cinematic quality. That continues at 9 p.m., followed a 10 by the “Silicon Valley” season-opener and then by this new show, with Kathryn Hahn as an empty-nester who finds the wilder parts of the internet.