Scientist Dalek (The Guide to the Dark Times)

A Dalek Scientist was a member of the Dalek Time Squad, a battalion of Time-Sensitive Daleks deployed by the Emperor of the Restoration to investigate numerous divergences in time and manipulate them for the benefit of the Restoration Empire. (PROSE: The Guide to the Dark Times) The divergences investigated by the Dalek Scientist and the Dalek Time Squad had been caused by the Tenth Doctor's attempt to render the Kotturuh extinct during the Dark Times. (PROSE: The Knight, The Fool and The Dead)

Physical appearance
The Dalek Scientist's casing resembled those of the silver Daleks of the Restoration Empire, but with a crimson dome, sense globes and slats. Its eyestalk lens was a bluish white with small green, yellow and blue lights surrounding it, while its luminosity dischargers were somewhat yellow. Instead of the familiar plunger-like structure, its manipulator arm ended in a six-fingered "claw". (PROSE: The Guide to the Dark Times)

Biography
After the Dalek Time Squad captured the Eighth Doctor, (AUDIO: He Kills Me, He Kills Me Not) the Dalek Scientist travelled with the Doctor, the Dalek Time Commander and the Dalek Prime Strategist to Wrax. Whilst the Doctor and the Prime Strategist went to examine the Wraxians' gallery, the Time Commander and the Scientist met the President of Wrax, offering an alliance and asking for a demonstration of the Wraxian superweapon, the Devolver. She agreed, but betrayed the Daleks and trapped the Scientist and the Time Commander, having acquired the Dalek origin matrix from a dead transmat pilot and intended to use the Devolver against the entire Dalek race. However, the Doctor made an agreement for the Daleks to withdraw in return for the Devolver’s dismantling, with the Scientist returning to the Squad’s time ship. (AUDIO: The Enemy of My Enemy)

Psychological profile
Melody Malone described the Dalek Scientist as "a whizz with temporal science". It was not only time-sensitive, but had a strong sense of how actions could affect both the future and the past, allowing it to use "time itself" as a weapon when devising "new and unusual plans" in conjunction with the Dalek Prime Strategist. (PROSE: The Guide to the Dark Times)

Behind the scene

 * Speaking of his portrayal as the Scientist, Nicholas Briggs described him as "very very picky and pedantic".