Holmes and Watson investigate a mass murder when a chef and his patrons are poisoned after dining on a tasting menu tainted with snake venom. Also, Detective Bell's crush on a work colleague makes Holmes realize his and Fiona's (Betty Gilpin) relationship is at an important crossroads.
While Elizabeth accompanies Alison on a college campus tour, she is ambushed by protestors about a Chilean mining operation involving the U.S. and Chilean governments. Also, Henry, Jane and Jose Campos (Carlos Gomez), attempt to track down Jibral Disah's third wife, Hijriyyah. (TV-PG L, V)