Where can I watch “Hawaii Five-O” Season 12 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 12 helps you follow the plot and character arcs leading into this episode.

Watch Hawaii Five-O Season 12 Episode 20 Online

“Woe To Wo Fat” — Watch "Hawaii Five-O" Season 12 Episode 20 online in HD for free. Check streaming providers, cast, and episode details.

Apr 5, 1980 Season 12 Episode 20 60 min TV-PG

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Hawaii Five-O Season 12

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Season 12 Episode 20 — Aired on Apr 5, 1980 • runs about 60 minutes.

Directed by Barry Crane.

Written by Frank Telford.

Notable cast/guest names in this episode include Jack Lord, Herman Wedemeyer, William Smith, Richard Denning.

This page includes 1 official still(s) (when available) plus legal availability links.

Looking for “watch Hawaii Five-O Season 12 Episode 20 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

The series concludes with the final showdown between McGarrett and Wo Fat. Three scientists have gone missing. They have one thing in common: they all attended a symposium that discussed a possible space-based, laser defense system. McGarrett impersonates a fourth scientist, Dr. Elton Raintree, who attended the same gathering and is soon abducted. Wo Fat is behind it all and wants the scientists to complete their work and produce such a device.