After the death of his artificial body built by Mehendri Solon, the Time Lord criminal Morbius was resurrected in a new body, his third after his original body and the artificial one. He attempted to wreak his revenge on Gallifrey and resume his dreams of galactic conquest, but was defeated when the entire timeline in which his resurrection had occurred was aborted, with only Straxus and Lucie Miller remembering it.
Biography
Resurrection
After Karn was bought by the leader of the Cult of Morbius, Cristophe Zarodnix, the Sisterhood of Karn were forced off-world before Zarodnix traveled there and found a fragment of Morbius' brain and began to look for a Time Lord, so he could extract DNA to fuse with what was left of Morbius in order to effect his resurrection. Zarodnix used DNA from the Time Lord agent Straxus to effect a new regeneration for Morbius. (AUDIO: The Vengeance of Morbius)
A new lease of life
In his new form, Morbius used a stellar manipulator to suck the power of the Eye of Harmony, making the Time Lords powerless to stop his conquest. Morbius rebuilt his military forces, including mind-controlled Trell, and spent a decade conquering over ten thousand worlds, but his body was unstable and required frequent gene-splicings (called "feedings") from Straxus. (AUDIO: The Vengeance of Morbius)
Defeat and unmaking
The Eighth Doctor and Lucie Miller, who had barely escaped from Gallifrey before Morbius used the stellar manipulator, arrived and worked with Straxus and the cybernetically augmented Trell policeman Rosto to steal the remote control for Morbius' stellar manipulator. The Doctor succeeded in taking the control and releasing the Time Lords, who promptly broke the Laws of Time to prevent Zarodnix's purchase of Karn and Morbius' resurrection; however, at the moment before the Timeline was rewritten, Morbius and the Doctor fell from the balcony of Morbius' palace. The Time Lords believed the Doctor to be dead, but he was actually transported by the Sisterhood to the planet Orbis. The timeline in which Morbius had been brought back to life was unmade, with only Lucie Miller and Straxus remembering it. (AUDIO: The Vengeance of Morbius)