AceShowbiz -

BBC One builds the anticipation for the upcoming "Sherlock" special with some pictures posted on its Twitter page. One of the images shows Martin Freeman's John Watson and Benedict Cumberbatch's title character, who points to something unseen with one hand while his left should appears to be missing.

Noticing the Photoshop failure, fans have taken to their on Twitter to share their crazy ideas and speculations about the plot of the special episode, although BBC One has corrected the mistake.

#221back #Sherlock #notkidding pic.twitter.com/iTfDqfJI0R

— BBC One (@BBCOne) November 25, 2014

"Do you think if it is a Victorian episode then Sherlock and John will walk together arm in arm down the street? Please let this happen," one Twitter user wrote. @cecilllee posted, "there was a zombie apocalypse and sherlock got bitten so mary cut off his arm #221back." @bencshoulder chimed in, "Sherlock Christmas special: The case of the missing shoulder and how it found its way back to its owner."

@onelastdanse poked fun at the blunder, "Oh look! Someone has removed Sherlock's ring finger and entire arm! Dr. Watson must be furious! He looks a bit mad..." @laughfeyson added, "maybe sherlock is pointing at his missing shoulder."

The other pictures feature a copy of the cover of the script. "This is what we've been doing today. Later on a pic of #Sherlock and John as they'll appear in the Special. #221back," they captioned the photos.

This is what we've been doing today! Later on a pic of Sherlock and John as they'll appear in the Special #221back pic.twitter.com/Aq4vncKpKy

— sue vertue (@suevertue) November 25, 2014

This is what we've been doing today. Later on a pic of #Sherlock and John as they'll appear in the Special. #221back pic.twitter.com/bdFIhcRMsW

— BBC One (@BBCOne) November 25, 2014

The "Sherlock" special will be filmed in January 2015. The three-episode season 4, meawhile, will be shot later the same year.