Where can I watch “Supergirl” Season 6 Episode 16 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).

Do I need to watch earlier episodes before “Nightmare in National City”?

Watching earlier episodes in season 6 helps you follow the plot and character arcs leading into this episode.

Watch Supergirl Season 6 Episode 16 Online

“Nightmare in National City” — Watch "Supergirl" Season 6 Episode 16 online in HD for free. Check streaming providers, cast, and episode details.

Oct 19, 2021 Season 6 Episode 16 42 min TV-14

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Supergirl Season 6

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Where can I watch "Nightmare in National City" online?

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Season 6 Episode 16 — Aired on Oct 19, 2021 • runs about 42 minutes.

Directed by Eric Dean Seaton.

Written by Rob Wright, Jess Kardos.

Notable cast/guest names in this episode include Melissa Benoist, Chyler Leigh, David Harewood, Katie McGrath.

This page includes 3 official still(s) (when available) plus legal availability links.

Looking for “watch Supergirl Season 6 Episode 16 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

Kara lands her dream story for Catco but when the city is suddenly attacked by a nightmare monster at the same time as her interview, she is forced to take a serious look at her life and decide if she can continue to live as both Kara and Supergirl. As Dreamer takes the lead on the search for the Dream Totem, which can vanquish they nightmare monster in National City, she realizes she needs to ask her sister Maeve for help.