Where can I watch “The Flash” Season 1 Episode 20 online?

This page provides episode info and a legal-only guide. It does not host streams or downloads. Check official platforms and licensed services for availability in your region (US first).

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Watching earlier episodes in season 1 helps you follow the plot and character arcs leading into this episode.

Watch The Flash Season 1 Episode 20 Online

“Good Night, Central City” — Watch "The Flash" Season 1 Episode 20 online in HD for free. Check streaming providers, cast, and episode details.

May 4, 1991 Season 1 Episode 20 45 min TV-PG

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The Flash Season 1

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Season 1 Episode 20 — Aired on May 4, 1991 • runs about 45 minutes.

Directed by Mario Azzopardi.

Written by Jim Trombetta.

Notable cast/guest names in this episode include John Wesley Shipp, Amanda Pays, Alex Désert.

This page includes 2 official still(s) (when available) plus legal availability links.

Looking for “watch The Flash Season 1 Episode 20 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

A small time crook gets a hold of a device that puts people to sleep. He goes on a spree while the people are unconscious. He has a plan to knock out the entire city, it's up to the Flash to stop him.