Democratic convention: The cable networks — CNN, C-SPAN, FNC, MSNBC — will provide coverage pretty much all day long. In primetime, PBS (Ch. 7) will be on from 7-10 p.m.; ABC (Ch. 4), CBS (Ch. 2) and NBC (Ch. 5) all plan an hour at 8 p.m.

High School Musical: Get in the Picture (7 p.m., Ch. 4): The six finalists have to sing TV theme songs.

Deal or No Deal (7 p.m., Ch. 5): Howie Mandel hosts. (Season premiere)

Prison Break (7 p.m., Ch. 13): The fourth-season premiere is next Monday, so Fox repeats last season's finale tonight.

The Closer (7 p.m., TNT): Sanchez's brother is shot. Kevin Bacon (the real-life husband of series star Kyra Sedgwick) directed this episode.

Saving Grace (8 and 11 p.m., TNT): In what TNT is calling the summer finale, a young Mexican woman dies after being dropped off at a hospital by a white supremacist.

Into the Unknown with Josh Bernstein (11 p.m., Discovery): Investigating a new theory about Noah's Ark.