Barney and Dietrich go on a call to a research facility where potentially dangerous DNA cultures are stolen. Harris is tasked with filling out a report from a woman who insists the man currently living with her isn't her husband, but actually is a clone.

Wojo and Levitt inves when a burglar is brought in, complaining about a group of apartment building tenants participate in vigilante justice. Dietrich deals with a census taker accused of breaking and entering when a family refuses to let him do his job. Meanwhile, the detectives offer Barney some unhelpful advice when he shares some information that he and his family might be losing their apartment.