Paul Anthony Stewart

When two motorists driving gas-guzzling cars die at the hands of a sniper, Danny and Kate are put on the case of what the city believes is the work of a radical environmental serial killer. Meanwhile, a bicycle accident sends Danny's son Sean to the hospital with a life-threatening injury.

Voight (Jason Beghe) calls the team to investigate a homicide involving the only witness in a rape and murder case against an extremely young man, Oliver Tuxhorn (guest star Gus Halper). Intelligence looks into Tuxhorn's family and their finances as they try to determine if someone was paid to take out the victim. Meanwhile, Stone (guest star Philip Winchester) offers Antonio (Jon Seda) a job as lead investigator for the state attorney's office, and Burgess (Marina Squerciati) and Sorensen's (guest star Kevin Kane) body cameras capture a bizarre exchange with a man that they pull over.

Diane and Lucca represent an ovarian cancer survivor looking to obtain custody of her previously donated embryos. Maia is the victim of a fake social media account. Mike Kresteva pays a visit to Reddick, Boseman and Kolstad. Matthew Perry guest stars.

Holmes and Watson investigate the poisoning of a relocation expert and discover the man led a decades-long secret career as a contract killer before his death. Also, Watson’s path to adopting a child suffers a setback as she prepares for a home visit from her agency case worker.

When unemployed television actor Mitch Carroll (guest star Chevy Chase) is arrested for drunk driving at 2 a.m. while wearing blood-stained clothes, Detectives Ed Green (Jesse L. Martin) and Nina Cassady (Milena Govich) find themselves the target of a drunken rant that reveals the actor's religious prejudices. The blood is soon discovered to belong to Carroll's former executive producer - but the case takes another turn when the same blood is found on Carroll's son John's (guest star Jaymie Dornan) shoes. A.D.A.s Jack McCoy (Sam Waterston) and Connie Rubirosa (Alana De La Garza) must then argue the role the father's prejudice had leading up the crime to ensure justice is served. S. Epatha Merkerson and Fred Dalton Thompson also star.