Case Closed - Season 1 Episode 618

The next day, the police reveal the identity of the man who created the note, Sabara Hades. Kogoro and Ran decode the riddle "My portion is like a chilled boiled egg like a corpse" which refers to City Hall. There, they find many dolls with Mazarin Stone written on their shirts where when beheaded, reveals the letter "T". The riddle "I finished up with a whole pickle" refers to 30 St Mary Axe where scratched up pens labeled as Dancing Men reveal the letter "N". Ran and Kogoro revisit Big Ben following the riddle "It rings again for my hatred" and find an arrow pointing to a drain where The Valley of Fear of fear is inscribed. They deduce something had been sunk in the river, and find a drain cover with the letter "A". Apollo leads the two to the next riddle, "Now I remember to ask a cake to celebrate in advance" referring to St Bride's Church where they find letters entitled A Scandal in Bohemia. Soaking the letter in water reveals the letter "S".