A fifth season was aired in the United States, but consisted entirely of re-runs of previous episodes being told as stories by Powermaster Optimus Prime.
[1] Scramble City was a special direct-to-video episode produced for the Japanese market, released in April 1986.
Set soon after the end of the second season, the episode focuses on the Autobots' efforts to construct a new mobile fortress, the titular "Scramble City."
When the Decepticons learn of this, their combiner robots are deployed to attack, and a battle between them and their Autobot counterparts ensues, focusing on their "Scramble Power" – the interchangeability of the individual limbs – to the extent that at one point, Breakdown of the Stunticons connects to Superion to damage him.
At the episode's conclusion, Scramble City is activated and assumes its robot mode of Metroplex to rout the Decepticons.