While the Chicago Fire/Chicago P.D. crossover is set to be quite dramatic, there’s also a chance of it having some romance! During the first hour, Chicago Fire, Casey (Jesse Spencer) will help Brett (Kara Killmer) as she considers meeting her birth mother. On Chicago P.D., Burgess (Marina Squerciati) is attempting to move forward from her miscarriage when her ex Roman (Brian Geraghty) returns to town to find his missing sister.