Felicity will head to Central City in The Flash episode 4 after hearing about Barry’s powers, and will help the S.T.A.R. Labs team stop Leonard Snart, a.k.a. Captain Cold. The Flash will also be visited by theArrow villain William Tockman, a.k.a. Clock King, in episode 7. The last time we saw Tockman, he had been stealing money to pay for his sister’s medical treatment. If he thinks he’ll have an easier time stealing in Central City, he has another thing coming given the new crimson blur running around. This episode will also feature metahumans Girder and Blackout, so Tockman will likely cross paths with them during his crime spree.