Claim: Sarah Jane Smith portrayed by Elisabeth Sladen had her first appearance was in The Time Warrior (1973, the 11th season).
Evidence: Sarah Jane Smith is a fictional character played by Elisabeth Sladen in the long-running BBC Television science fiction series Doctor Who and two of its spin-offs. The Time Warrior (1973) The Time Warrior is the first serial of the 11th season of the British science fiction television series Doctor Who, which was first broadcast in four weekly parts on BBC1 from 15 December 1973 to 5 January 1974.