NBC News will lose a piece of prime time real estate this fall with the cancellation of "Rock Center with Brian Williams" (10 p.m., NBC10), but that's no reason not to appreciate the effort to give us a news magazine that was more than a compendium of true crime and overwrought interviews. (No, that's not a shot at "60 Minutes," which is still the gold standard for news magazines. But it deserves better competition than it gets.)
In Friday's installment, Kate Snow looks at the death of a Dallas woman that revealed problems with the way Dallas handled domestic-violence cases; Harry Smith talks to Marc Fucarile, one of the last of the Boston Marathon bombing victims still hospitalized; and Williams talks to, OK, Zach Galifianakis. According to NBC, "they talk fame, farms and between two ferns." Which sounds promising enough.
-- "Shark Tank" (8 p.m., 6 ABC) has two back-to-back episodes, with the season finale at 9. The first hour, according to ABC, includes an update on Aaron Krause, the Folcroft, Pa., man who got one of the "sharks" to invest in his "Scrub Daddy."