BBC tweeted a photograph of Benedict Cumberbatch and Martin Freeman in Victorian attires as part of the upcoming special episode of “Sherlock,” set in 19th century England. The special is expected to be released in November.

The photo release comes just hours before a panel on “Sherlock” is set to meet Thursday at Comic-Con in San Diego to discuss the latest adventures of Sherlock Holmes and Dr. John Watson. Steven Moffat, co-creator, executive producer and writer, will speak at the event along with Executive Producer Sue Vertue and Rupert Graves, who plays Greg Lestrade.

Moffat revealed in March that the special will be set in the Victorian century. “The special is its own thing. We wouldn’t have done the story we’re doing, and the way we’re doing it, if we didn’t have this special. It’s not part of the run of three episodes,” he told Entertainment Weekly, cited by Variety, adding: “So we had this to do it — as we could hardly conceal — it’s Victorian. (Co-creator) Mark Gatiss and me, we wanted to do this, but it had to be a special, it had to be a separate entity on its own. It’s kind of in its own little bubble.”

The last episode of Season 3 suggested that Jim Moriarty, the consulting criminal, may still be alive and pose a new threat to London. The exact date for the release of Season 4 has not been revealed yet.