CW | 8:00 pm
While on a mission that takes them back in time, Cisco and Chester (Carlos Valdes, Brandon McKnight) find themselves stubbornly stuck in 1998, where they are forced to repeat the same day over and over, in the new episode "The One With the Nineties." They know the key to getting back to their present time can be found in Chester's childhood home, but unpleasant memories of that time make him reluctant to go there. Elsewhere, Iris (Candice Patton) makes a connection with the speed force. Grant Gustin also stars.