Cybershade

Cybershades were a variant of Cybermen that served Miss Hartigan and the Cybus Cybermen.

Biology and Appearance
Cybershades were wraith like creatures with bronze Cyber-heads.

The Doctor remarked that Cybershades had the brains of dogs. They were seemingly unable to run upright, instead they were only known to run on all fours or bent over low. They were incapable of speech, instead making growls to communicate with others and only seemed to be able to obey simple commands at best.

It can be supposed the the Cybershades cloak like attire is due to the fact that they were used as scouts and were therefore designed to blend in with their surrounding environment. The shades were incredibly agile and could jump at least 5 metres off of the ground. They had enough strength to pull two grown men whislst still running at full speed and could scale walls and land safely when falling from a great height. These abilities were exhibited by Cybershade 16 who leapt up onto the edge of a building, scaled the wall whilst tethered to both the Doctor and Jackson Lake, ran across the floor of the building on all fours (still dragging the two men) before jumping out of the window and seemingly landing safely.

Instead of the traditional handle-bars, Cybershades had handle-bars that resembled piping that was connected to their heads, instead of the normal handle-bars that went into a crest on the top of a Cyberman's head. (DW: The Next Doctor) Mercy Hartigan had a CyberShade assigned to drive her personal horse-and-buggy.

History
Sometime during the 19th Century, the Cybermen of a Parallel Earth broke out of The Void. Needing extra work force, they created the Cybershades as guards and scouts, modeling them on animals so as not to draw to much attention. At least 16 Cybershades were created.

When the Cybermen made contact with Miss Hartigan, the Cybershades were placed under her command. At least one Cybershade was being hunted by "The Doctor"., but it always managed to evade him.

When Miss Hartigan (now the Cyber-King) took control of a the Cybermen and entered a large, mobile Cyber factory, at least two Cybershades accompanied her (although there could have been more). When The Doctor gave her back her emotions, the Cybershades exploded along with her and the Cybermen, presumably making the Cybershades extinct.

Trivia

 * The concept of Cybermen using less-developed organic brains to create servant units is not unheard of. A similar process was used by the Mondasian Cybermen to create early Cybermats. (BFBS: The Crystal of Cantus)

Behind the scenes
Cybershades were first revealed in Russell T. Davies: The Writer's Tale, where it was confirmed that they would appear in The Next Doctor.

In this episode, at least one Cybershade was played by Ruari Mears, who had played the part of Hath Gable in The Doctor's Daughter.

It was confirmed by the Doctor Who Website that the Cybershades have animal brains in the Jack Harness Monster file (Captain Jack's Monster Files: Cybermen).