Tonight, Chicago PD, aspin-off, premieres on NBC. has been a solid success story, growing into the usual broadcast winner of the Tuesday 10PM timeslot (though it regularly was beaten by FX's .) However it is not the sort of runaway hit that usually inspires spin-offs. Wednesday has been a weak spot in NBC's line-up, with tanking in the 10PM timeslot earlier this season. Last night, without the benefit of as a lead-in, garnered a 1.9 adults 18-49 . 's premiere earned a 1.3 adults 18-49 rating. How do you think Chicago PD will fare tonight?