Daniel Amerman

The CSIs are confronted with a puzzling mystery when two different victims are linked by the same unusual weapon.

When the boys get tested for STDs, Artie tests positive for a disease and he’s forced to tell his sexual partners. Meanwhile, Kurt and Blaine have relationship issues when Blaine puts on his “freshman fifteen.” Musical performances include "Addicted To Love", "I Want To Know What Love Is", "Let's Wait Awhile", and "Love Is A Battlefield".

Andy invites his old a cappella group to perform for Halloween, which leads to a confrontation with his frenemy; Dwight tries to track down a madman in the office; Jim and Pam fight over his new job.