A researcher -- one of Sherlock's fellow beekeepers -- who was investigating a deadly honey bee outbreak is killed; Capt. Gregson asks Watson for help with an unofficial investigation that helps him make a decision.
While Elizabeth is in Libya to help negotiate an end to its civil war, a tragic accident with her chauffeured car embroils her in an urgent situation to secure medical care for a gravely wounded local girl.
Gamby and Russell invade Dr. Brown's private space; the vice principals are spooked by a school evaluator.
Alex and Ryan get close when the trainees leave campus for their first undercover assignment; Alex tells her side of the story in a public interview.
