1) “Masterpiece: Magpie Murders” debut, 9 p.m., PBS. Two mysteries wind through this intriguing six-parter. One is in real life … or the reality of this show. The other is in a novel that is missing its final chapter. We bounce between the two – one set in the 1950s, the other now; at times, a probing editor even envisions cryptic talks with the fictional,’50s detective (shown here with is assistant). With few likable characters, “Magpie” is slow to engage viewers; still, it’s worth the wait.
2) More “Masterpiece,” 8 and 10 p.m., PBS. It’s a splendid night of mystery openers; surrounding the complex “Magpie” are basic, crime-of-the-week tales. At 10 p.m., “Annika” has Nicola Walker as a seaside homicide detective; its smart story is sometimes obscured by thick Scottish accents. At 8, “Miss Scarlet and the Duke” is the bright-eyed tale of the only female detective in Victorian London. A missing-woman case offers quick twists.
3) “House of the Dragon,” 9 p.m., HBO, rerunning at 10:01 and 11:37. This has been a big week for fans of epic fantasy. On Friday, the “Lord of the Rings” prequel had its season-finale on Amazon Prime; now this “Game of Thromes” prequel is a week from its finale. They’ll both be back next year.
4) “Chesapeake Shores” series finale, 9 p.m., Hallmark. This began six years ago with Abby, a big-city executive, returning home. She found romance – first with a singer, then with Evan, an entrepreneur – and family trouble. But now her parents (Treat Williams and Barbara Niven) are remarrying, with his mother (Diane Ladd) back for the wedding. Kevin (Abby’s brother) and Sarah have their baby and Evan meets with his father. It’s a busy finish.
5) ALSO: Sunday is pro-football day, concluding with a Cowboy-Eagle game at 8:20 p.m. on NBC. But baseball also has its play-offs. If needed, it has game four of two best-of-five battles in the American League and game five in the National League. The winners begin the next round Tuesday (National) and Wednesday (American). And as other epics leave, AMC has “Walking Dead” at 9 p.m. and the lush “Interview With the Vampire” at 10:08.