Dalek Jast is a recurring antagonist in the Doctor Who revival series. He is a member of the Cult of Skaro. He appears as a supporting antagonist in series two and three.
He was voiced by Nicholas Briggs, alongside many other Daleks in the show.
Dalek Jast and the other members of the Cult of Skaro emerged from the void with the Genesis Ark in London in 2007 after they escaped the Time War. When they got there, they looked for someone who could help them force the ark open.
The Daleks fatally scanned Dr Singh's brain and learned another species, the Cybermen, had invaded Earth. The Cyber-Leader declared war while the Cult declared "pest control". Dalek Jast took part in the Battle of Canary Wharf, in which the Genesis Ark released a very large number of Daleks onto Earth.
When the Genesis Ark released numerous daleks upon the world, The Tenth Doctor opened the rift that the cybermen came through and sucked everything back in that was covered in 'void stuff'. Because the Cult of Skaro were covered in it too, they would have been sucked in too. Because of that, the cult activated an emergency temporal shift and escaped.
Daleks in Manhattan
The Cult ended up in New York City in 1930. There, they recruited Mr. Diagoras to help them revitalize the daleks by kidnapping innocent people. When Diagoras was summoned to meet Sec, Jast and the others were present. Jast later joined Caan in sorting out which humans they captured should become pig slaves and which would become Daleks, taking the latter to their laboratory. When they got there, they were present when Dalek Sec became a human Dalek.
When the Doctor met the cult in the laboratory, he caused a loud noise that distracted the Daleks long enough for the Doctor to escape with his allies. Sec ordered the Daleks to give chase. Later, Thay returned to the lab to show Sec a visual of Jast and Caan attacking the homeless denizens of New York. Sec ordered Caan to spare the Doctor's life and simply have the Doctor come to the lab, which he did. After Dalek Sec changed his mind about killing people, The other Daleks no longer accepted Sec as their leader and promptly mutinied and imprisoned him before injecting the humans in their lab with a different gene solution.
When Dalek Thay & Dalek Jast ordered the 'Dalek Humans' to kill the Doctor, the humans simply questioned their orders. The Doctor explained how he got in the way of the gamma strike which had brought them to life. His DNA had become mixed with theirs, giving them a dose of Time Lord freedom. A battle broke out between two Cult drones and the Dalek-humans. Jast and Thay were destroyed.
Jast normally spoke when addressed or when there was something truly important at steak. He was exceptionally loyal to Dalek Sec until the latter contradicted Dalek society by trying to live without killing others.