Pangol

Pangol was the devious "son" of Mena, and actually a clone.

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Pangol was the youngest Argolin on the leisure planet Argolis. Ostensibly the son of Mena, he was in fact a clone created in the Argolins' Recreation Generator. He wanted to lead Argolis into war and conquest, contrary to the ethics of his pacifist people, and so tried to create a new army by duplicating himself in the Recreation Generator. However, he only ended up creating short-lived duplicates of the Doctor, who was hiding in the generator at the time.The generator was finally used to rejuvenate Pangol back to a baby. (DW: The Leisure Hive)