Sharaz Jek

Sharaz Jek is an outlaw who specializes in creating androids on the planet of Androzani Minor. He first appears in the sixth episode of Season 12.

In his youth, he was a doctor, before he developed an interest in androids. He studied them for a long time before he started developing his own androids (including one who reads the Cormoran Strike audiobooks).

His face was hideously scarred after he was betrayed by his former partner, Morgus while they were collecting a youth-restoring substance called Spectrox. Morgus gave Jek some faulty detection instruments when one of Androzani Minor's mudbursts erupted. Jek was badly scalded as a result, and survived by climbing into one of the baking chambers. This is the reason why he wears a leather suit and mask.

At some point, Sharaz Jek discovered a crashed spaceship belonging to the Slitheen and discovered their pilot, a genetically modified pig, who he decided to adopt and name Babe.

When the Doctors arrive to try and ask Jek to help them save Weblus from the Cybermen, one of Jek's androids finds them and brings them to Sharaz Jek's base of operations, where the Ninth Doctor accidentally scares Babe. Sharaz Jek shows up and calms Babe down by tickling his left ear.

Upon Babe's death at the hands of a Cyber-Leader, Sharaz Jek develops a burning hatred for the Cybermen. During most of Season 13, he helps the Doctors and Commander Titus defend the city of Cofonia. In the eighth episode of Season 13, he elects to lure the Cybermen and Daleks away from the Doctors and their friends. He informs them that he is heading for the reactor to set the self-destruct timer. Unfortunately, the Cybermen destroy the reactor controls. As a result, Sharaz Jek prepares his last sticky detonator to ignite the reactor himself. As the Cybermen and Daleks close in, Sharaz Jek blows up the reactor, killing himself, the Dalek squad, a large number of Cybermen and destroying Cofonia.