Where can I watch “Ben 10: Alien Force” Season 3 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 3 helps you follow the plot and character arcs leading into this episode.

Watch Ben 10: Alien Force Season 3 Episode 20 Online

“The Final Battle (2)” — Watch "Ben 10: Alien Force" Season 3 Episode 20 online in HD for free. Check streaming providers, cast, and episode details.

Mar 26, 2010 Season 3 Episode 20 23 min TV-Y7

7.7 ★ ★ ★ ★ ★

6 votes

Ben 10: Alien Force Season 3

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Season 3 Episode 20 — Aired on Mar 26, 2010 • runs about 23 minutes.

Directed by Butch Lukic, Dan Riba.

Written by Dwayne McDuffie.

Notable cast/guest names in this episode include Yuri Lowenthal, Ashley Johnson, Greg Cipes.

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

Looking for “watch Ben 10: Alien Force Season 3 Episode 20 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

Powerless, Ben goes aboard Vilgax's ship and faces off with Vilgax to stop his invasion of Earth in their final battle. Albedo gives Ben the Ultimatrix and Ben gets his old aliens and their evolved forms.