The Return of the Duo Doctor Mysterio

The Return of the Duo Doctor Mysterio is a special episode in the final Uku Kivistik's Doctor Who season 15.

This time, the 14th Doctor wanted to go to a castle with young Nardole to investigate. Unfortunately they land on Logopolis and the 13th Doctor meets the female one at last. Together, they three go down to the Kaleidoscope and go to the all versions of it to stop the Kaleidoscope Master, Kaleidoscope Doctor and Kaleidoscope Lord. They three go to the deepest corners of the Kaleidoscope streams, all New, Present and the Old Kaleidoscope to stop the evil gang. The Kaleidoscope Master escapes to Kaleidoscope Akathen, a corrupt version of Akathen. The Kaleidoscope Doctor escapes to Kaleidoscope Droid Void, a corrupt and distorted survived version of Droid Void. And the Kaleidoscope Lord (Distorted, colourful and corrupt version of all the Doctor's enemies together put) goes to Kaleidoscope Gallifrey/Isolated Gallifrey. The Doctors and Nardole manage to go after the Kaleidoscope Master and destroy his fake body to restore Akathen and the New Kaleidoscope. Then the gang goes to Kaleidoscope Droid Void to stop the fake Doctor. The fake Doctor was infused with a Cyber-Dalek, making it a Kaleidoscope Time Cyber-Dalek. Fortunately, they destroy the Dalek and restoring the Droid Void and the Present Kaleidoscope. Then they realise that Isolated Gallifrey never existed and it's Medusa Cascade itself. The gang goes in, only to find themselves on Trenzalore, after the town was destroyed and dead corpses everywhere. They see that Kaleidoscope Lord has already occupied the town. The 14th Doctor wants to destroy the Lord but 13th Doctor stops her and goes himself to fight against the Lord. After that all Kaleidoscope Streams were restored. Logopolis/Grand Kaleidoscope was safe again.

Trivia

 * This is pretty much the continuation of the episode "Kaleidoscope" except a bit different.
 * This was the final appearance of the 13th Doctor.
 * What exactly happened to Catherine, is unknown.
 * On the similiar topic, Catherine's stuck in the Forgotten Kaleidoscope, a long lost timestream sealed off.
 * Old name was Kaleidoscope II.
 * This is the 2nd of 5th episode connected to the Kaleidoscope.