Watch The Flash 6×16 Promo “So Long and Goodnight”

The promo for the new episode of The Flash has been released. This new episode is titled “So Long and Goodnight” and it will air on April 7.

In this new episode, “After Black Hole hires Rag Doll (guest star Troy James) to kill Joe (Jesse L. Martin), Singh (guest star Patrick Sabongui) suggests he go into Witness Protection but Joe refuses to stop investigating Carver (guest star Eric Nenninger). While investigating Carver with Cisco (Carlos Valdes), Ralph (Hartley Sawyer) runs into Sue (guest star Natalie Dreyfuss). Iris (Candice Patton) becomes suspicious of Eva (guest star Efrat Dor).”

Source: The CW