Complete story — includes the ending
Mathematician Harlan Emple comes across a dead body packed in mothballs while participating in a "math hunt", a number game with a puzzle involving Belphegor's prime. When another body is found, it is believed that the game is intended to be a death trap for mathematicians or, as it turns out, one mathematician in particular. Meanwhile, Joan tries to convince Kitty, who was a rape victim, to join a support group.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, List of Elementary episodes. HTML formatting and reference markers removed. · Content license