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It stars Jason Isaacs as Michael Britten, a police detective. After a car accident takes the life of a family member, he lives two alternating parallel lives, one with his wife and one with his son. In each reality, he works different cases that are somehow tied together in seemingly meaningless ways.
Now you see, it's only partway through it's first season, and it's already been cancelled. It's been highly acclaimed (even with an 8.8/10 on IMDb), yet it's being cut short while other mediocre shows survive. It's not very often that you find a show that makes you think and even question what you think is real. It's very original, yet it hasn't gotten a lot of attention somply because it's not some slaptstick comedy or reality garbage.
It has a lot of depth, and shouldn't be abandoned just because it's a little too complex for the casual TV-watchers. It's barely had a chance to establish a place among the high caliber programs, and it should at least get a second season to show how much it has to offer.