Alpha (The Evil of the Daleks)
Alpha was one of three altered Daleks given the Human Factor as an experiment by the Dalek Emperor. The others were Beta and Omega, all named by the Second Doctor. (TV: The Evil of the Daleks) Alpha survived the Dalek Civil War on Skaro and led humanised Daleks to the planet Kyrol. Here they survived and bred, but were manipulated by Kata-Phobus, a telepathic parasite. They destroyed themselves to stop it from feeding on them. (COMIC: Children of the Revolution)
Appearance
As a test Dalek, Alpha had a silver Dalek casing with blue sense globes. He was given a Greek "A" mark on his dome to distinguish him. (TV: The Evil of the Daleks) On Kyrol, Alpha had a red casing with a red dome, silver slats and neck rings and black globes. (COMIC: Children of the Revolution)
Behind the scenes
An action figure of Alpha, as seen in Children of the Revolution, was released alongside the Eighth Doctor by Character Options.