Episode Description: Beware, spoilers! To read - hover over the text.
Sherlock after leaving Mi-6 worked with kitty, a young girl. She's his student. Kitty is jealous of Joan and Sherlock to letting them work, constantly underfoot. Case which they are investigating, concerns orange pimpochek - the parts of the toys. Pimpochki poisonous and there are people killed by them. Maybe it's revenge because the perpetrator sends exactly five orange seeds, to kill.