Joseph Michael Straczynski is an American filmmaker and comic book writer. He is the founder of Synthetic Worlds Ltd. and Studio JMS and is best known as the creator of the science fiction television series Babylon 5 (1993–1998) and its spinoff Crusade (1999), as well as the series Jeremiah (2002–2004) and Sense8 (2015–2018). He is the executor of the estate of Harlan Ellison.