1.12 Crazy for You (The Flash 2014)

Plot Summary
This episode's metahuman case involves Shawna, a woman who can teleport. She breaks out her lover from Iron Heights Prison. During this time, Barry takes Caitlin to the karaoke bar where Barry meets Linda Park while Cisco considers Hartley's help to find out what happened to Ronnie. During the search for Ronnie, Cisco discovers Ronnie had merged with Martin Stein. Then, Hartley attacks Cisco and escapes.

Due to Barry's father trying to hunt information about Clay, he is attacked by a prison inmate. Flash takes the inmate out in order to find Clay's whereabouts.

Later on, Flash captures Shawna by leading them into a tunnel and destroying all light source which prevents Shawna from using her teleportation powers.