When a young graffiti artist witnesses the murder of an LAPD Detective, Carter and Lee must track him down so they can prove that a well-known criminal is responsible.

Hornstock is a murder suspect when his third ex-wife is killed, so he turns to Rosewood and Villa to help him clear his name.

Team Scorpion enlists the help of a musician who created a controversial algorithm that generates hit songs to help find the murderer of a music blogger. Meanwhile, Drew asks Walter…