Robert Eli

When a teenage girl is found dead, Rollins goes undercover at a high-end rehab center where the victim was last seen; Benson tries to overcome her doubts about Sheila.

A woman with a rare disease surfaces in Massachusetts and brings illness and death to everyone she encounters.

A patient refuses medication for her pain; Dr. Halstead treats a former high school classmate; a pregnant woman has a big reason not to deliver her child.