Doctor Who: Every Regeneration Ranked From Worst To Best
2. The Fifth Doctor (The Caves Of Androzani)
The final story of Peter Davison's Fifth Doctor takes him and his companion Peri to the Androzani system of planets.
Androzani is famous for containing spectrox, a mineral with life-extending qualities when diluted. Unfortunately, the Doctor manages to step in some raw spectrox, which is lethal.
The Doctor succumbs to the illness and enters a hallucinogenic state. Visions of past companions begin to swirl around his head, all begging him not to die. Then, a larger vision of the Master appears, who tells him to perish with a gleeful laugh.
The screen then fills with a bizarre pinkish-purplish pattern, as the voices of the Doctor's friends and foes merge together. The screen then snaps back to normal, and Davison is gone.
It's a fantastically melodramatic regeneration that perfect simulates the poison running through the Doctor's body. It's still one of the most interesting regenerations to watch all these years later. It's just a shame about what happened to the show after this scene.