1.21 Grodd Lives (The Flash 2014)

Plot Summary
After Barry runs in with a culprit who has a mysterious side effect of sending both Barry and himself headaches, Iris enters S.T.A.R. Labs when Barry is in costume. While Iris and Barry have a talk, Cisco and Caitlin eavesdrop on the two via surveillance camera.

Over at Central City Picture News, Iris and Joe argued over how everyone knew Barry's secret except her. The following day, Barry helps Joe stop the suspect from raiding the transport of gold. When unmasking the suspect, they find out it's General Eiling.