The Inspector Lynley Mysteries (PBS, 9-10:30 pm): That dashing lord of the realm is back on the beat in this summer's "Mystery!" In the first episode, a little boy has disappeared and an old school chum, now a teacher, calls Lynley for help. Ancient traditions and modern obsessions can't hide the truth from Lynley and Sergeant Havers, a working-class woman with a sharp eye and a brazen wit. TV-PG
P.O.V. - Soldados: Chicanos in Vietnam (PBS, 10-10:30 p.m.): Latinos have fought in every US war since the Revolutionary War, and we have rarely heard about them - until now. In this poignant documentary, Latinos from California tell their story about the difficulties of fighting in Vietnam and later adjusting to home life.
At Home With the Braithwaites (BBC America, 8-9 p.m.): In this new series (well, new to us), a mom of three wins the Euro-lottery, but she keeps it a secret. She wants to do good with it, so she sets up a charitable trust. There are riches here that are well worth watching. TV-PG
US Open (CBS, 8 p.m.): Get ready to see a new winner emerge from the women's final. Serena Williams is not competing this year because of a knee injury.