Victor Chaplin was Jenny Chaplin's brother. (AUDIO: After the Daleks) He was taken by the Daleks to become a Roboman (TV: The Dalek Invasion of Earth) in 2166. (PROSE: Lucifer Rising)
During the Dalek invasion, Victor was Roboman designation number 328-Alpha-0.
After the Daleks' conquest had ended, Jenny found her brother. Victor was discovered in Hyde Park, with other converted Robomen. He did not remember his original identity and still thought himself a servant to his masters, the Daleks. Jenny brought Susan Foreman to visit him, and he revealed that one Dalek still remained on Earth. When Marcus Bray killed the last Dalek he came to his assistance and went missing shortly afterwards. Susan realised that the strange orange liquid cured him from the robotisation. She learnt from him about what Marcus did in the invasion. (AUDIO: After the Daleks)