Dalek Jast Dalek Jast was a member of the Cult of Skaro . He had the highest - pitched voice of the members of the Cult . Biography . Origins . Jast was the Force Leader of the Outer Rim Defensive Battalion and was chosen to be part of the Cult of Skaro along with Dalek Thay , Dalek Caan and their leader , Dalek Sec . The purpose of the cult was to " think like the enemy " and come up with novel and unorthodox methods of furthering the Dalek s ' cause in a predicted war that was coming . It was their leader , Dalek Sec , who began using their initiative to defeat enemies . ( PROSE : " Birth of a Legend " ) During the Last Great Time War the cult escaped the carnage by hiding between realities in a Void ship , along with the Genesis Ark , which contained an army of imprisoned Daleks . ( TV : " Doomsday " ) The Battle of Canary Wharf . The Void ship appeared in Torchwood One in 2007 . The Cult emerged after an army of five million Cybermen appeared across the world . Jast was the first to realise the Tenth Doctor was still alive after the arrival of the Cybermen when he noticed the Doctor on a video transmission with the Cyber - Leader . In the sphere chamber , Jast activated the awakening process and monitored the Genesis Ark on its priming consoles until the final stage of the awakening ; time travellers used their hand to transmit the universe ' s background radiation as power supply . During the battle , the Genesis Ark rose and unleashed millions of Daleks on the world . Shortly after , the Doctor and Rose sucked the Daleks and Cybermen back into the void . ( TV : " Doomsday " ) The Cult of Skaro used an Emergency Temporal Shift to escape to 1930 New York City . ( TV : " Daleks in Manhattan " ) The Final Experiment . Like Caan and Thay , he had doubts about his leader ' s choices on preserving the Daleks . Thay protested to Sec about him becoming the first human - Dalek , Jast backed Thay ' s objections , saying Daleks were supreme and humans were weak . Nonetheless , he assisted , injecting Sec with Chromatin solution . Along with Caan and Thay , Jast turned against Sec during the creation of the Dalek - humans . When the Doctor discovered the group had overridden the gene feed , Jast took aim at him , ordering him to step away from the controls . Sec ordered Jast to stand down , to be told , " He is an enemy of the Daleks , and so are YOU ! " After the Doctor escaped to prevent the Gamma strike , Sec protested that the others had betrayed him . Jast replied that it was Sec who had told them to imagine , resulting in them imagining their leader ' s irrelevance . At the Laurenzi theatre , Jast and Thay confronted the Doctor with the imprisoned Dalek Sec . Thay announced it was the beginning of a new age . Jast added Earth would become the new Skaro . When the Dalek - humans questioned their orders after Gallifreyan DNA was mixed with theirs , Thay fired on the new Daleks . Jast instantly supported Thay in the battle . When Thay was destroyed , all the new Daleks concentrated on Jast , resulting in his destruction soon after . ( TV : " Evolution of the Daleks " ) Personality . He had the highest - pitched voice of the members of the Cult . Jast was highly reserved , only speaking when addressed or when he believed it to be vital to the matter at hand . He was the most faithful servant to Dalek Sec and often stayed at his side during their time at the Empire State Building in 1930 , and was the last to join the cult ' s rebellion against Sec . ( TV : " Evolution of the Daleks " ) Other information . Dalek Jast , as with all Daleks that originated from the Last Great Time War , possessed markings below his eyepiece to identify him . ( TV : " Doomsday " ) Dalek Jast was the first member Dalek Sec spoke to in the cult . Dalek Jast also was the one responsible in protecting the Genesis Ark . Dalek Jast was the third one to introduce himself to the Tenth Doctor . He was the one asissting Dalek Sec during the final experiment . He was also the third to be killed out of the cult by the Human Daleks .