Doctor Who fans have another mystery to solve before this year’s Christmas special, following the release of a new official poster.

The sci-fi, which airs on the BBC in the UK and Disney Plus internationally, previously announced that this year’s festive episode will be called Joy to the world.

However, in the new artwork revealed by Disney Plus to coincide with Doctor Who Day, the title is instead printed under the title Joy to the Worlds.

While fans initially thought the plural “Worlds” was a mistake, the Disney Doctor Who social media account responded to the comments to indicate something else was afoot.

In response to a fan asking why there was an “s” at the end of the title, the @disneydoctorwho Instagram wrote: “We won’t get any spoilers.”

Another subscriber asking the same question got the answer: “Tune in on Christmas Day to find out”, while a separate comment from the official account added: “WORLDS? ???? I have to log in to see what this means!”

This has led some to speculate that there might be a multiversal twist, while others have wondered if the UK and international versions of the episode might be slightly different.

As for what we know about the episode, Joy to the World(s) was written by former Doctor Who showrunner Steven Moffat and stars Ncuti Gatwa as the Fifteenth Doctor with The Bridgerton ChroniclesNicola Coughlan as a character named Joy.

Moffat previously told BBC South East from the episode’s plot: “Imagine in the very distant future that a hotel chain comes up with the idea of ​​time travel. What is the first thing a hotel chain would do if it had a time travel? She would realize that she had an opportunity to sell all the unsold nights in their own hotels in history.

Elsewhere during the day Doctor Who, Moffat participated in a live tweet for its recent episode Boom, the series announced its largest ever prop and costume auction with over 150 lots, and Patrick Troughton’s final story as the Second Doctor – The War Games – was confirmed that it will receive a special colorized edition next month.

Learn more:

Doctor Who will return to BBC One and BBC iPlayer this Christmas Day. Previous seasons are available to stream on BBC iPlayer.

Discover more of our Science fiction cover or visit our TV guide And Streaming Guide to see what happens tonight. For more on TV’s biggest stars, listen The Radio Times podcast.