Here is the official description for Chicago PD season 2 episode 19, "The Three G's" - airing April 8th.
Season 2 Episode 19 "The Three G's"
THE SEARCH IS ON FOR ONE OF CHICAGO'S MOST WANTED FUGITIVES AFTER SEVERAL DEAD TEENAGE GIRLS ARE FOUND IN A CHINATOWN FACTORY
When the father of one of the dead girls explains that he paid Dennis Lee (guest star Kelvin Han Yee) to have her brought to America, this hits home with Olinsky. Lee is one of the Chicago's most wanted fugitives and escaped Olinsky once before. Intelligence isn't about to let Lee dupe them again and Olinsky's past files prove valuable in finding Lee's whereabouts. Meanwhile, Sean Roman has an altercation with a fellow officer which lands him in a bit of trouble. At the same time Platt helps prepare Nadia (guest star Stella Maeve) to take her polygraph test after passing the CPD written exam.
Olinsky (Elias Koteas)
Sean Roman (Brian Geraghty)
Platt (Amy Morton)
Jesse Lee Soffer
guest & recurring cast:
Nadia (Stella Maeve)
Dennis Lee (Kelvin Han Yee)