Dalek Thay

Dalek Thay, Former Commandant of Station Alpha, was a member of the Cult of Skaro.

History
Thay was the first Dalek to encounter the Cybermen during the Battle of Canary Wharf in 2007. Thay was tricked into identifying himself by the Cybermen after both sides refused to "identify first." When the Cybermen proposed an alliance, Thay denied them their request and opened fire on them, returning to the sphere chamber, Thay aided in the awakening process and fought in the following battles against the Cybermen and Torchwood staff to protect the Genesis ark until it opened. Thay spoke in a slightly low-pitched voice with an unusal nasal croak.(DW: Doomsday)

In 1930 in New York City, Thay originally had strong feelings against the Final Experiment, even to the point of countering Dalek Sec's orders, claiming that it was against the Dalek ideology of racial purity, but eventually conceded that it was necessary for survival. To complete the Empire State Building before the gamma strike would hit Earth, three of the back plates of Thay's casing were removed and attached to the building's mast, being replaced with iron as the bonded polycarbide of the plates was required to attract the gamma strike. (DW: Daleks in Manhattan) When the Doctor witnessed Dalek Sec become a Human-Dalek and freed multiple prisoners, Thay, Caan and the Pig-slaves tried to recapture them. Failing to do so Caan ordered the slaves to return to base. Once alone, Caan asked Thay's opinion of Sec. Thay stated the cult was created to follow Sec but confirmed he had doubts. When Sec sent Jast, Caan and the pig slaves to attack Hoverville, Thay stayed with his leader to oversee the assault via a visual link and noted Sec's reaction to Soloman's extermination. He later demanded an explanation as to why Sec had spared the Doctor. Sec replied that the Doctor was a genius and the future of the Daleks depended on him. During the creation of the Dalek Humans, Thay rebelled against Sec and the Doctor with Jast and Caan. Thay justified Jast's statement that Sec had lost his authority by stating he was no longer Dalek. While confronting the Doctor in the theatre, Thay claimed the Time Lord had to die. Sec, now imprisoned in chains on Thay's Manipulator arm, threw himself in front of Thay's death ray causing his extermination. After the Doctor explained that the Dalek-Humans weren't Daleks and that his Gallifreyan DNA was mixed with their Dalek and Human DNA in the "Final Experiment", the Dalek-Humans questioned orders and revolted against their Dalek masters. Thay immediatley opened fire on the hybrids claiming "If they will not obey then they must die!" Although Thay and Jast exterminated many Dalek-Humans in the process, the resulting fire fight destroyed them both. (DW: Evolution of the Daleks)

Personality
Dalek Thay had the second lowest pitch voice of the Cult, with a nasal croak. Thay was the least reserved of the Cult and would often voice his opinion to his leader. He would often taunt his opponents with Dalek ideals and always seemed to want the Dalek race to be "pure", as demonstrated during the Final Experiment. During the experiment, he protested to Sec's bonding with Mr Diagoras and later protested when the Doctor and Sec spoke of how Davros was wrong to strip the Daleks of emotions, and that it would be better to no longer be the "supreme beings". He seemed very loyal to Dalek Sec and his until his hybridisation, and to Dalek Caan when they revolted against Dalek Sec. He did not hesitate to exterminate anyone who stood in their way, including Sec himself.