The trial of Morbius saw the conviction of the renegade Time Lord Morbius for war crimes after his army was defeated by the Time Lord's and their allies. The outcome of the trial was decided in advance, but it still took place. It was staged on Karn and attended by Maren, leader of the Sisterhood of Karn and an enemy of Morbius.
Once he was found guilty, Morbius was placed in a dispersal chamber and seemingly atomised. However, his brain had been removed by Mehendri Solon, allowing him to survive the destruction of his body. (TV: The Brain of Morbius, PROSE: Warmonger)