Where can I watch “FlashForward” Season 1 Episode 21 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 FlashForward Season 1 Episode 21 Online

“Countdown” — Watch "FlashForward" Season 1 Episode 21 online in HD for free. Check streaming providers, cast, and episode details.

May 13, 2010 Season 1 Episode 21 45 min TV-14

8.6 ★ ★ ★ ★ ★

9 votes

FlashForward Season 1

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Season 1 Episode 21 — Aired on May 13, 2010 • runs about 45 minutes.

Directed by John Polson.

Written by Seth Hoffman, Lisa Zwerling.

Notable cast/guest names in this episode include Joseph Fiennes, John Cho, Courtney B. Vance, Dominic Monaghan.

This page includes 6 official still(s) (when available) plus legal availability links.

Looking for “watch FlashForward Season 1 Episode 21 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

Mark continues his interrogation of Hellinger in a desperate attempt to find out when the next blackout will occur. Demetri must choose between helping Janis and Simon break into NLAP to stop the blackout from occurring, or turning the fugitive Simon in to the FBI. Elsewhere, Lloyd finds the common denominator that can help him solve the complex equation he was working on in his flashforward.