“Depression: Out of the Shadows” (3 a.m., PBS): This new documentary provides rigorous

“Depression: Out of the Shadows” (3 a.m., PBS): This new documentary provides rigorous examination of a condition that affects tens of millions of lives, yet is remarkably underdiagnosed and undertreated. The program features intimate portrayals of families dealing with the disorder.

“American Gladiators” (8 p.m., NBC): Is it just us, or is NBC trying to milk “American Gladiators” for every drop of sweat it can? This episode brings another clash of the spandex-clad titans that we’ll be watching from the safety of our couch.