Flashpoint: While broadcasting live, a notorious radio talk show host holds a prominent politician hostage to get even for a murder he believes the bigwig committed several years ago in this repeat (9 p.m. CBS).
Miami Medical: Proctor and Zambrano (Jeremy Northam, Lana Parrilla) question how far they will go for their patients following two accidents in the drama's season finale (10 p.m. CBS).
20/20: Former model Katie Piper recalls the horrific day a stranger doused her with sulfuric acid, and shares her road to recovery (10 p.m. ABC).
Merlin: The medieval, supernatural series offers its season finale (10 p.m. Syfy).
America Celebrates July 4th at Ford's Theatre: Ty Burrell hosts the annual gala, with appearances by Kelly Clarkson, Dick Van Dyke, Renee Fleming, George Lopez, Lionel Richie and Robin Roberts, along with Laura Michelle Kelly and Gavin Lee from Broadway's "Mary Poppins" and the Soldiers' Chorus of the United States Army Field Band (9 p.m. ABC).
You Lucky Dog: After training a dog to herd sheep, a woman uses the animal to search for a group of missing children in this 2010 TV movies starring Natasha Henstridge and Harry Hamlin (9 p.m. Hallmark).
World Cup soccer: Quarterfinals: Brazil vs. Netherlands, from Port Elizabeth, South Africa (6:30 a.m. ESPN); Ghana vs. Uruguay, from Johannesburg, South Africa (11 a.m. ESPN).
NASCAR racing: Nationwide Series: Subway Jalapeno 250: Qualifying (10 a.m. ESPN2); race (5 p.m. ESPN).
Baseball: The Cincinnati Reds visit the Chicago Cubs (11 a.m. WGN A); the Dodgers visit the Diamondbacks (6:30 p.m. FS Prime); the Kansas City Royals visit the Angels (7 p.m. FSN).
Arena football: The Chicago Rush visit the Tampa Bay Storm (5 p.m. NFL).
Boxing: Friday Night Fights; Mike Arnaoutis vs. Demetrius Hopkins, super middleweights. (8 p.m. ESPN2).