The Secret of Baritsu
Milky Holmes and G4 are informed about a girl named Irene Doala who went missing in the Yokohama woods. While searching for her, Sherlock and Kokoro become separated from their respective groups, winding up in a cave along with Irene. Irene explains she got lost while finding a treasure chest so she can stop her father's company from going bankrupt. When a bear attacks them on their journey back, Sherlock makes several failed attempts to rescue them only be coincidentally saved by an unexploded bomb. They are later found by G4 and returned home.
Aired 28/10/2010EP 4 - The Secret of Baritsu
Detective Opera Milky Holmes
"Sheryl, Nero, Elly, and Cordelia are the most popular students at Holmes Detective Academy, because of the many cases they've solved with their Toys and teamwork. The students and the people of the Detective City Yokohama all look up to the members of "Milky Holmes", as they're called. But on a dark and stormy night, during a battle with their rivals "The Gentlemen Thief Empire", they lose their toys, and their fate undergoes a dramatic change..."
(Source: Crunchyroll)