What makes it not so great
When The Killing first aired, it made a lot of people very angry, largely because the first season ended without resolving the Rosie Larsen murder case. The showrunners insisted there was no reason to expect the investigation to take only one season, but they were apparently the only ones.
That's water under the bridge now that you can stream every episode of The Killing whenever you want. Watch the show in giant gulps of several episodes at a time, you might not even notice that you're creeping up on the season finale The pacing makes much more sense when it's not being unspooled a week at a time, because when you want to know what happens next, the next episode is already waiting for you.
Also — and this is something that will only bother people in Seattle — The Killing is not really very Seattle-y. It seems like every scene takes place in a rainstorm, which is actually fairly rare. Seattle has a lot of days in which it rains, but it almost never rains hard enough to require an umbrella. Canada — where the show is actually filmed — provides a pretty good simulation of Seattle, but it's just not the real thing. I wouldn't harp on this, but Seattle so rarely gets to be the setting for something, now that Frasier's closed up shop.
What's the math
Homicide: Life on the Street times Seattle minus everything but one case.
So how is it?
It's good. The tone is a bit oppressive, because it's dark and rainy all the time and there are times it seems like justice will never be served. But that's good for a show like The Killing. It helps put you in the mindset of the detectives, who are fighting against seemingly insurmountable odds, political pressures, and even each other to solve the case.
How many hours should I watch at a time?
If you've already seen the three seasons that aired on AMC, you have only six new episodes to finish off the series. Knock them off in a pair of three-hour sessions and pat yourself on the back for a job well done.
If you haven't seen The Killing at all, start slow, with three or four hours at a stretch. That should take you to the end of Season One in three days, and then you can ramp up to watching all of Season Two and Season Three in a pair of nine-hour marathon sessions. The final season is only six one-hour episodes, so that should be a piece of cake to watch on your fifth day.
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