Maggie and OA lead the search for an abducted former biological weapons chemist.

Detectives Lupo and Bernard investigate a serial killer who targets homeless men and discover that a copycat may be at work.

A jogger killed in Central Park turns out to be the second wife of a former comedy club owner, who was acquitted of killing his first wife. And convicting him…

An assailant breaks the wrist of a tennis player prior to a tournament, and a competitor is among the suspects.