"2012 Summer Olympic Games" 7 p.m. to 11 p.m., NBC (New)

The final night of gymnastics includes men's parallel bars and horizontal bars and women's balance beam and floor exercise. Also tonight: track and field and beach volleyball.

"A Raisin in the Sun" 7 p.m. to 9:15 p.m., TCM (1961)

A substantial insurance payment could mean either financial salvation or personal ruin for a poor black family in Chicago. This drama stars Sidney Poitier and Ruby Dee.

"History Detectives" 7 p.m., PBS (New)

A viewer wants to know if a picture frame was made from a piece of the staircase banister of the Titanic or Lusitania. Another viewer has Woolworth signs from the historic 1960 North Carolina sit-ins. And the experts try to determine whether a journal filled with liquor receipts means the original owner was a bootlegger during Prohibition.

"Dance Moms" 8 p.m., Lifetime (New)

When one girl breaks her foot, one of the mothers uses the injury as an opportunity to get her daughter positioned to be the girl's replacement.