Sometime in the 1980s, he worked as a professor at the University of California in Berkeley, working for the Advanced Research Project. However, he was fired for building a small atomic bomb as a demonstration that any lunatic could build one. Twenty years later, he started working at Berkeley again as "Daniel Joyce", a physics professor from Cornell University in Ithaca, New York. The Eighth Doctor said the name Joyce "fit him".
After the millennium he gave Professor Wagg a new beryllium chip to make up for the one that was stolen from him. In 2002, Joyce assisted the Eighth Doctor (whom he called "son") in defeating Griffin and in closing a dimensional scar. Joyce told the Doctor that he had begun experimenting with his biodata at this time, but refused to tell him why. He called the Doctor and many of his students "son".
Behind the scenes Edit
- In The Gallifrey Chronicles, the character Ulysses, who originated as the Doctor's father in Philip Segal's proposed late 1990s revival of Doctor Who, last appears in the company of Larna, Daniel Joyce's assistant. In real life, author James Joyce wrote a novel called Ulysses.
- It was commonly speculated by fans that Joyce was a later incarnation of Professor Chronotis from Shada, the existence of which almost certainly inspired the character. However, this was later denied by writer Jonathan Blum. 
- Joyce was to feature in a Doctor Who novel by Kate Orman, but the novel was never published.