Matt Smith may have just left Doctor Who but according to the show's lead writer and executive producer Steven Moffat, he could turn up in Moffat's other hit show Sherlock.
Smith has exited the Tardis, making room for new Time Lord Peter Capaldi at the end of the Christmas special. The Brit left the show in order to concentrate on his bid to crack Hollywood, with his first major US movie How To Catch a Monster hitting cinemas this June.
While Matt has landed a key role in Ryan Gosling's directoral debut, Moffat hints that the actor hasn't ruled out a return to British telly.
Moffat says that there's every chance Matt could star in a future episode of Sherlock, which sees Benedict Cumberbatch and Martin Freeman play the super sleuth and his sidekick Watson.
Will Matt Smith be joining Benedict Cumberbatch in Sherlock? (WENN)
Before fans get too excited though, Moffat has warned that he would only cast Matt if there was a "perfect part for him".
"Nothing is impossible, but it's not something we're particularly striving for," he explained to Zap2it.com. "There's enough inevitable crossover talk between those two, [so] it might be disconcerting for either of [Matt or Benedict Cumberbatch] to appear in the other's show."
"Stunt casting doesn't work, so it would have to be just because he was overwhelmingly right for it," Moffat continued. "I love working with Matt. He's a phenomenal actor. I'd jump at the chance to work with him again. I [just] don't know how likely that is to be on the set of Sherlock.'"
The third and final episode of Sherlock's current run hits BBC1 on Sunday Janaury 12.