"Dance Moms" 8 p.m. Lifetime (third season finale) — Abby makes a surprise announcement.

"NCIS" 8 p.m. CBS — The NCIS team hunts for Bodnar.

"Splash" 8 p.m. ABC — A mystery celebrity diver shows up.

"The Voice" 8 p.m. NBC — More knockout rounds. Vedo is the only Atlantan left.

"Dancing With the Stars" 9 p.m. ABC — Most at risk going home: Sean Lowe and Andy Dick.

"NCIS: Los Angeles" 9 p.m. CBS — Callen questions Hetty's motives.

"Golden Boy" 10 p.m. CBS — Clark reflects on his own family's struggles.

"20/20" 10:01 p.m. ABC — Diane Sawyer interviews Amanda Knox, the American exchange student convicted in Italy of murder in 2007, a verdict overturned in 2011.