When did Transformers Portal Season 1 Episode 12 air?
Transformers Portal Season 1 Episode 12 aired on December 29, 2017.

Transformers: Portal (Трансформеры Портал Transformery Portal) is a licensed animated web series exclusive to Russia, which began in September 2016. Designed by Marvelous Group, the series depicts a crossover between the 2015 Robots in Disguise and Titans Return franchises (https://tfwiki.net).
The final fight was left to the Autobots. Wheeljack's device is destroyed, the portals are liquidated. But their consequences can be irreversible. Can both universes continue to exist as before? (Youtube)
Direct answers for episode-level questions and details.
Transformers Portal Season 1 Episode 12 aired on December 29, 2017.
This episode runs for approximately 2 minutes.
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