S1E617 : Holmes' Revelation (Love is 0)

Ran, feeling upset as she believes Shinichi does not share her feelings, is confided by Apollo's sister, pro tennis player Minerva Glass. Minerva then parts ways with Ran advising her love is zero and would never amount to anything no matter the effort. Ran calls Shinichi for advice on the riddles. Conan, tells Ran the first riddle "A rolling bell rises me", refers to Big Ben and accidentally reveals he is in London. Realizing Ran will discover Conan's true identity if she finds him, Conan and Agasa flee from her. Conan becomes cornered in a phone booth and is forced to take the antidote to the APTX 4869 for the return trip and confronts Ran as Shinichi. Ran confesses her pain of liking Shinichi who is indifferent to her feelings and runs away as he pursues her.