Elementary - Season 3, Episode 24: Soundtracks

At a diner, Sherlock meets with Oscar, he tells her about his sister, Olivia, then tells him if find her Alfredo will go free.

Sherlock grabs the heroin kit and walks off into the tunnel; Joan receives a text as she arrives home; Joan comes onto the rooftop, she tells Sherlock his father knows what happened and is coming.