Where can I watch “The Batman” Season 5 Episode 12 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 5 helps you follow the plot and character arcs leading into this episode.

Watch The Batman Season 5 Episode 12 Online

“Lost Heroes (1)” — Watch "The Batman" Season 5 Episode 12 online in HD for free. Check streaming providers, cast, and episode details.

Mar 8, 2008 Season 5 Episode 12 22 min TV-Y7

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The Batman Season 5

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Season 5 Episode 12 — Aired on Mar 8, 2008 • runs about 22 minutes.

Written by Stan Berkowitz.

Notable cast/guest names in this episode include Rino Romano, Evan Sabara, Danielle Judovits, Alastair Duncan.

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

Looking for “watch The Batman Season 5 Episode 12 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

The super-powered members of the Justice League begin disappearing one by one. Only Batman and Green Arrow are left to investigate and discover that old enemies are involved.