After the nuclear explosion outside of Central City, Eiling comes after Firestorm, intent on using him to develop super-soldiers. Meanwhile, Mason asks Iris to help him investigate S.T.A.R. Labs, and Martin and Barry discuss the possibility of time travel after Joe shows Barry what he found at the old house.moreless
When the merged Martin and Ronnie attack a physicist, the team sets out to bring in "Firestorm". Meanwhile Joe recruits Cisco to help him investigate the house where Nora was murdered.