A master hacker dubbed Clock King coordinates a series of raids on banks in Starling City, and his skills prove a match for Felicity. Meanwhile, Laurel's grudge with Sara continues and on the island, a pilot crashes his plane there and Sara tends to the dying man.
Quest roles:
Caity Lotz(Sara Lance / White Canary), Bex Taylor-Klaus(Sin), Alex Kingston(Dinah Lance), Robert Knepper(William Tockman / Clock King), Curtis Caravaggio(Walczak), Tig Fong(Certo), Russell Porter(Sin's Father)