Sophia is going to make a great addition to this cast. She will play Erin Lindsay. The character is a part of the CPD investigative team. They are not spoiling much but she does have some kind of past that is going to be very interesting and should make her character one people are interested in knowing more about this season.
Patrick Flueger of "The 4400" has been added to the cast of "Chicago PD" as well. He will be playing a rookie on the show and has a bit of a hot head.
"Chicago PD" does not have a start date yet, but it will be a mid-season show. This means it will probably start in Jan. but hopefully a premiere date will come out soon.