John Lucarotti was a British screenwriter. He created the television series Operation Patch (later novelised), The Ravelled
Thread, and The Panther's Leap. He wrote ten episodes for The Avengers, thirty-two episodes for The Troubleshooters and contributed
fifteen episodes to the BBC's Doctor Who in the 1960s, the three serials Marco Polo, The Aztecs and The Massacre of St Bartholomew's
Eve. He subsequently novelised his scripts for Target Books. He contributed a script for what ultimately became the 1975 serial
The Ark in Space, but it was rewritten by script editor Robert Holmes and Lucarotti received no on-screen credit.