Dalek leader (Destiny of the Daleks)

The Dalek commander of the expedition squad seeking the species' creator, Davros, in the ruins of the Dalek City was a Grey Dalek whose casing was painted a darker shade of grey than its subordinates'. (TV: Destiny of the Daleks)

Biography
It ordered the capture of a newly-regenerated Romana. During the Dalek-Movellan War, it remained loyal to Davros and even threatened to kill all of the prisoners if the Fourth Doctor didn't surrender Davros to them. It was destroyed by an explosive implanted on its casing after the Doctor blinded its eyestalk with his hat. (TV: Destiny of the Daleks)

Legacy
It was remembered by the Fourth Doctor before his regeneration into his next incarnation. (TV: Logopolis)

Behind the scenes

 * Through the flashback in Logopolis, the dark gray Dalek commander from Destiny of the Daleks is one of a very small number of individual Daleks to make multiple televised appearances in the “classic series” of Doctor Who.