On TV this week
JFK Assassination: The Definitive Guide, 8 p.m., History On the 50th anniversary of John F. Kennedy's assassination, this special tries to pin down what exactly happened. That's difficult, given the more than 300 conspiracy theories the show has to sift through.
WHERE WERE YOU? The Day JFK Died Reported by Tom Brokaw, 9 p.m., NBC If you get bored halfway through the History Channel's special, Tom Brokaw has his own. This is more of a memorial than an examination, though, so there's not much of a point in live tweeting here.
SEASON PREMIERE Nikita, 9 p.m., CW Nikita is on the lam after being framed for killing the president. So, of course, the first thing she does is talk to a reporter.
Nashville 2.0, 9 p.m., PBS Rosanne Cash, the Avett Brothers, Emmylou Harris and Mumford & Sons perform on a show dedicated to Americana music. That's a wide-ranging category you won't necessarily see on iTunes.
Doctor Who, 2:50 p.m., BBC America Wonder why this special episode, "The Day of the Doctor," is on in the middle of college gameday? It's being simulcast around the world, so every Doctor Who fan can see David Tennant, Billie Piper and John Hurt at the same time. Doctor Who fans aren't that big on college football, anyway.
Bill Cosby: Far From Finished, 8 p.m., Comedy Central Believe it or not, Bill Cosby still does standup. He hasn't done a concert on TV in something like three decades, though, so this one will bring back memories of a better time, when HBO showed Bill Cosby: Himself 14 times a day.
Stonados, 9 p.m., SyFy We ditch the sharks for rock-throwing twisters destroying Boston. This one was delayed from April, out of respect for the victims of the tragic Boston Marathon bombing, but now it must be okay to ruin Beantown again, probably because the Red Sox won the World Series.
Sarah Silverman: We Are Miracles, 10 p.m., HBO While Cosby keeps it clean on Comedy Central, one of the filthiest mouths in standup does her thing on HBO, which now only repeats things twice a week.
The 2013 American Music Awards, 8 p.m., ABC Gossip alert: Miley Cyrus is on the performance slate. We hear she's going to club baby seals with a prosthetic limb she stole from an orphan while smoking crack, all while sliding down the world's tallest stripper pole.
SEASON FINALE Boardwalk Empire, 9 p.m., HBO One thing's for sure: Eli is going to have to deal with a conflict of some sort. Tension!
SERIES PREMIERE Getting On, 10 p.m., HBO A comedy starring Laurie Metcalf, Alex Borstein and Niecy Nash as workers in a hospital geriatric wing. It's based on a British sitcom, so you know it'll be good for at least six episodes (or until you find the original online somewhere).
SERIES PREMIERE Ja'mie: Private School Girl, 10:30 p.m., HBO If you were into Australia's Summer Heights High, here's more of Chris Lilley doing her thing on her own show. Where are Mr. G and Jonah?
— Joshua Gillin firstname.lastname@example.org