Unit 9 was a 1963-era Dalek who appeared in The Dalek That Time Forgot, Part 2.
The Dalek That Time ForgotEdit
Unit 9 was the "Lone Unit" who descended to the lower levels. After seeing the mysterious equipment, Unit 9 tried to contact the Dalek Commander, but was shot in the back by Ca'an. Ca'an used Unit 9's DNA to create the Dalek Genetisist.