Ellen Gray's TV picks
* INSIDE THE AMERICAN MOB. 10 p.m. Sunday, National Geographic Channel.
Philadelphia's in the spotlight this week in the third installment of this documentary series, "New York-Philly War," which, among other things, chronicles the 1980 death of mob boss Angelo Bruno and its bloody aftermath, with the help of former hit man "Crazy Phil" Leonetti.
* THE KILLING. 9 p.m. Sunday, AMC.
So far, this third season has been far less disappointing than the first two (and the conclusion of last week's episode left me as shaken as anything I've seen on television for some time). Will Sunday's two-hour finale leave viewers satisfied? We'll see.
* OUR NIXON. 9 p.m. Sunday, CNN.
If you didn't catch its debut earlier in the week, this curious look back at the Nixon presidency through footage shot by his personal aides - and subsequently confiscated by the FBI - offers an unusual view of an experience that one former aide likened to being in "a brilliantly lighted, badly run television show."
* AIR JAWS: COUNTDOWN TO SHARK WEEK 2013. 8 p.m. Sunday, Discovery Channel.
As a wise man once remarked - in the pilot for NBC's "Community" - "we're the only species on Earth that observes Shark Week." I don't claim to get it (though I did watch "Sharknado"), but if you've been waiting all year, Shark Week is here.