Roy Harper came to meet Oliver Queen but Felicity Smoak tells him to wait as Oliver is not available.
Detective Lance calls Felicity telling her that SCPD Laboratory is having blood samples of The Arrow then Felicity gives Roy Harper a job to break in SCPD Laboratory and get the samples.
Roy Harper breaks in SCPD Laboratory to get blood samples of The Arrow.
Felicity Smoak helps Roy Harper escaping SCPD Laboratory.
Roy Harper escapes SCPD Laboratory getting the blood samples of The Arrow with the help of Felicity Smoak.
Roy Harper gives the blood samples to Felicity and felicity allows him to meet Oliver Queen.