The name of baker street is seen in a scene. This is a reference to Sherlock Holmes.
A chalk outline of the body on the bathroom floor. TV and movie writers love the chalk outline; however, in the real world the outline is only used if a body must be moved before the crime scene examination is complete. Prosecutors hate the 'chalk fairy', that never identified cop who can't resist tampering with a crime scene and thus calling into question any physical evidence present.