 Sec questioned the genetic superiority of the Dalek race, and proposed the evolution into Hybrid Daleks, which he hoped would combine the best traits of both humans and Daleks.In "Evolution of the Daleks", Sec, who had transformed into a "human Dalek", was removed from command by Caan and eventually killed by Thay.The Dalek Humans, tainted by Time Lord DNA due to the Doctor's interference with Thay's aforementioned casing, turned on the Cult, killing both Thay and Jast.