Following the First Doctor's emergency evacuation of the Council of Earth and Mars mission to Corbo, Chertzog was a companion of the First Doctor. He travelled alongside Dr Harroll Strong, and Strong's children, Jack and Dot, as well as Shelly and Hill.

He was a tough, middle-aged Dutchman. (PROSE: The Playthings of Fo)

Behind the scenes[edit | edit source]

Though a member of the Earth-Mars mission to Corbo, Chertzog is not actually introduced or mentioned until The Playthings of Fo.

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