The eldest son of King Charles I, who had been executed by the Roundheads on 30 January 1649, Charles became the king in 1660 after Parliament invited him to take the throne of England. (PROSE: The Roundheads) The Fourth Doctor told Sarah Jane Smith that he met Charles II before he became king. At the time, he was on the run from the Roundheads and the Doctor helped him to hide in an old oak tree. (PROSE: The Republican's Story) The Sixth Doctor also claimed to have met Charles II. (PROSE: Players)