From IMDB:

Marcella Backland left the Metropolitan Police for the sake of her family, only to have her husband leave her. She returns to her job on the murder squad, investigating a case that seems disturbingly familiar to her.

From Netflix you can stream 8 episodes of Season 1.  It is not clear from IMDB whether there is a Season 2, but in any case Netflix offers only Season 1.

Although the acting is fine, the story is complicated, new characters seem to pop up regularly, and the 8 episodes drag on a bit.  Marcella herself falls into strange fugue states from time to time without any explanation as she works to catch one and possibly two serial killers. Along with all the murders, not all of which are serial murders, there is no lack of suspicious characters.  Of all the characters, Sinéad Cusack, who plays Sylvia Gibson, is wonderful as a woman you can hate on first sight.

We stuck it out to the end of Season 1 out of mere curiosity.