Complex sentence: Towards the end of the series, he was retaken by the Voltron Force and restored to his original Voltron-allied programming, and exposed Zarkon's true plans to the Alliance.
Split into simpler sentences: Towards the end of the series, he was retaken by the Voltron Force and restored to his original Voltron allied programming. Then, Amalgamus and the Voltron Force exposed Zarkon's true plans to the Alliance.