BBC Radio 5 Live's Richard Bacon probed Moffat on the subject this afternoon, but the TV writer refused to confirm or deny suggestions that previous Doctors such as David Tennant and Christopher Eccleston could return.
"I'm not telling you," said Moffat. When Bacon replied: "That means a yes," Moffat added: "Is it? Oh good."
Bacon continued to try to tease information from Moffat on the subject, discovering that the show boss recently had dinner with Tennant,
"I saw [David] the other night, he's in very good form," said Moffat.
"He's a mate of mine. We went for the dinner the other night. I showed him photos of the new series."
After describing Sylvester McCoy as a "cracking Doctor", Bacon jokingly asked if he would also be involved in a multi-Doctor special. Moffat still refused to play ball on the subject.
Speaking about a possible return last week, Tennant added fuel to fan speculation, commenting: "I cannot be drawn on anything.
"Who knows what will happen next year? I'm sure there are lots of plans being discussed. I am not confirming nor denying anything."
Tennant was the show's Tenth Doctor between 2005 and 2010.
Matt Smith has spoken on numerous occasions about his support for a multi-Doctor episode and his desire to work alongside Tennant and Eccleston.
