In the “Plastique” episode, after a bomb goes off downtown, the army, led by General Eiling (guest star Clancy Brown), rolls in and takes over the case, much to Joe’s (Jesse Martin) surprise. Suspicious, Joe tells Barry (Grant Gustin) that he and his friends at S.T.A.R. Labs should look into the army’s involvement. Wells (Tom Cavanagh) informs the team that Eiling was experimenting on his men to turn them into super soldiers. Cisco (Carlos Valdes) confirms one of Eiling’s soldiers, Bette Sans Souci (guest star Kelly Frye), was at the bomb site. The Flash tracks her down and realizes that she’s not setting off the bombs, she is a meta-human who can blow things up just by touching them. Meanwhile, when Joe learns Iris is writing about “the streak,” he tells Barry to make her stop. Barry realizes Iris won’t listen to him so he decides to have The Flash pay her a visit.