Mob City was a limited series on TNT. It is set in 1947 Los Angeles. Major characters include William Parker, who later became Police Chef, Bugsy Siegel, and Mickey Cohen. Fictional characters are also included.
It is good. It should be in black and white. However, it does look good and some of the cast does well. Simon Pegg is surprisingly good in his guest staring role. The actor playing Mickey Cohen (Jeremy Luke) was also pretty good.
There are various plot lines that overlap. The LAPD is out to get Bugsy Siegel and his associates. Some people in the department are concerned with the corruption in the department.
Apparently there will not be a follow up season. The show did end on a cliffhanger.