What to Watch on Saturday: Allyson Felix goes for Olympic gold

Summer Olympics (NBC, other channels) – The games continue with track and field, volleyball and diving. Allyson Felix attempts to lead the U.S. to a sixth straight Olympic gold medal in the women's 4x400m relay. Check out the full TV and live-stream schedule at nbcolympics.com.

Rush Hour (8 p.m., CBS) - In the series finale, Carter and Lee must infiltrate a meeting of gang lords to save Lee’s sister before she becomes a member.

Boy in the Attic (8 p.m., Lifetime) - A teen girl falls in love with the boy who has been hiding in her attic. Glitch: he’s accused of murder.

Summer Love (9 p.m., Hallmark) - After going back to school, a widowed suburban mom struggles to adjust when an internship lands her in the fast-paced world of millionaire app designers.