Chatter over the upcoming season of BBC One's hit show Sherlock has now increased exponentially following one of its stars Martin Freeman (Dr. John Watson) being spotted alongside a stunt double on the Cardiff Bay set on Thursday.

The actor was seen sporting a black bomber jacket with a light checkered shirt underneath it along with blue pants.

According to Wales Online, the cast and crew were hard at work, and were initially scoped out by fans near Bute Street for their second day of shooting.

On Wednesday, Benedict Cumberbatch (Sherlock) and the newly attached Lars Mikkelsen, who'll play the villain, were also witnessed in the Cardiff vicinity. Cumberbatch could be seen donning a dark hoodie that hid his character's costume.

More On Lars Mikkelsen casting here

Loyalists of the program took to Twitter to voice their excitement, as one of them complemented his black curly mane.

"I just love his curls," Nicole Chan posted.

Another fan went on social media to tease the actor for a tracksuit he was wearing on set by stating, "that outfit does nothing for your figure."

BBC One's Sherlock will be returning to the small screen on Thursday, October 31. Be sure to keep checking back for more of the latest details on the TV series. A fan-made season 3 video trailer can be watched below.

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