'Sherlock' season 4 spoilers: Sherlock and Watson in Morocco; will we see a familiar enemy's return?

With season 4, "Sherlock" will be going to places it hasn't gone before. A report by HuffPost via Cultbox claims that the cast and crew are headed to Marrakesh, Morocco to shoot some scenes for the upcoming season.

The filming for the first of four episodes of "Sherlock" season 4 was done in Cardiff in Wales. The second installment is being filmed there as well.

After that, lead stars Benedict Cumberbatch and Martin Freeman are expected to fly to Morocco for the next phase of the "Sherlock" season 4 production.

A new setting certainly presents exciting opportunities for "Sherlock" season 4. It remains to be seen how the change in location will impact the show, although it may be most evident in the storytelling aspect.

Things have been moving fast filming-wise, seeing that 50 percent of the shoot is almost complete. This makes it more likely that a Christmas premiere of "Sherlock" season 4 is in the offing instead of early 2017.

Meanwhile, in the second episode of "Sherlock" season 4, "Captain America" star Toby Jones will appear as a villain to Sherlock (Cumberbatch) and Watson (Freeman).

"I'm excited and intrigued by the character I shall be playing in Sherlock," Jones said in the press release announcing his casting.

The actor will play the role of "one of Doyle's finest villains," as series co-creator, writer and executive producer Steven Moffat put it. According to Digital Spy, he might play the role of Moriarty's (Andrew Scott) right-hand man Colonel Sebastian Moran.

Deemed as the second most dangerous man in London, Moran will be a likely character to appear in "Sherlock" season 4 since the third season has already foreshadowed the possible comeback of Moriarty himself.

On the other hand, "Sherlock" co-creator, writer and executive producer Mark Gatiss has been posting photos of the back of cast members to indicate that they are back on the set.

The latest two he posted appears to be that of Molly (Louise Brealey) and Mrs. Hudson (Una Stubbs).