See No Evil - S11.E60

Hollis and Jarvis throw a surprise birthday party for Page, and invite all of her friends from the section house. However, a love triangle involving officers at Stafford Row boils over and Hollis is the only witness to a fight between two of their officers. Stritch is determined to prove that police officers are not above the law, and Hollis has an attack of conscience over whether or not to grass on his colleague.