Three's a Mech is the fifth episode of Mr. Mech, and the final episode of the backstory flashback. In it, Tyrontics escapes and explores Mr. Mech's prison compound. He succeeds in finding his mech, Black Lightning, realizing that Mr. Mech's mechanics have added a new weapon to it called the "Fist of Thunder Justice". He takes Black Lightning back to the prison, uses the Fist of Thunder Justice to punch a hole through the cell wall, and he, Kishima, and Jeromech escape on the Free Breeze.

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