Chicago PD 4×18 “Little Bit of Light” Season 4 Episode 18 Promo – When Chicago’s “Night Crawler” Bobby Trent (guest star Michael B. Woods) is murdered over a single piece of mysterious footage, Intelligence must investigate one of Chicago’s wealthiest families — uncovering a lineage of old money and secrets. Meanwhile, Burgess’s (Marina Squerciati) sister Nicole (guest star Jules Willcox) arrives at the District for a visit, and presents an icy attitude towards Ruzek (Patrick John Flueger). Also starring Jason Beghe, Jesse Lee Soffer, Sophia Bush, Elias Koteas, LaRoyce Hawkins and Amy Morton. Guest starring Kim Shaw, Chris Agos and Patrick Page.