"I know King Shark is technically a bad guy, but you should see. Just wait. When he fights Grodd, it's-"
"Um! Spoiler alert.

Nora West-Allen and Cisco Ramon[src]

This article contains plot details about an upcoming episode.

"So Long and Goodnight"[2] is the upcoming sixteenth episode of the sixth season of The Flash, and the one-hundred-thirtieth episode overall. It will air on April 21, 2020[1].


After Black Hole hires Rag Doll to kill Joe, Singh suggests he go into Witness Protection but Joe refuses to stop investigating Carver. While investigating Carver with Cisco, Ralph runs into Sue. Iris becomes suspicious of Eva.[src]



Guest starring


  • This episode was originally set to air on March 31, 2020. However, it was pushed back with a rerun of "Grodd Friended Me" to air instead to accommodate the halted production of every other TV show from the ongoing COVID-19 coronavirus pandemic.[3]
    • After being pushed to April 7, the episode was delayed yet again. Reruns of Crisis on Infinite Earths will air during that week instead.[4]
    • The title for this episode is somewhat similar to the episode title from "The Flash" of 1990, "Good Night Central City".
    • On March 30th, 2020, The CW released a graph of returning shows, confirming both The Flash and Legends of Tomorrow would return on April 21 with new episodes.


  1. "Riverdale, The Flash and More Get Spring Return Dates on The CW" - TVLine
  2. 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 "Listings - FLASH, THE on The CW" - The Futon Critic
  3. "With Productions in Limbo, Networks Start Replacing Originals With Repeats" - TVLine
  4. "The CW to Re-Air “Crisis on Infinite Earths” in April Amid Coronavirus Pandemic" - Comic Book
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