Watchmen is a very tight-lipped production. NDA's are in place and cast and crew are not risking anything, but some things are pretty hard to hide. Decatur, which is standing in for Tulsa, saw a rather large location shoot filming in their downtown area, complete with a funeral procession of police cars, limos and a hearse. Not to mention a police escort -- featuring officers wearing telltale partial yellow facemasks.

One sharp-eyed local noticed that Jean Smart (Fargo, Designing Women) was on set, and her casting was confirmed earlier today by /Film. It was also revealed that her character works for the FBI and goes by the name Agent Baker, who may or may not be related to Silk Spectre and The Comedian. As with all details of this project, it is all very mysterious.

One longstanding mystery has been solved, however. After much speculation about the role Jeremy Irons would be playing, it was finally confirmed that he will, in fact, be playing Ozymandias/Adrian Veidt. The original character description for him was an "aging and imperious lord of a British manor," and we do know that they shot for weeks in Wales earlier this year with Tom, but the question still remains whether he will also be shooting stateside with the rest of the cast. Heck, we don't know whether Tom is shooting stateside either, and probably won't for sometime, given the secretive nature of the whole production.

The show is shooting in and around Atlanta into early next year and is slated to air on HBO some time in 2019.

Pre-production on Watchmen has been going on for weeks, according to an Instagram post by series executive producer and director Nicole Kassell, but it looks like shooting will finally begin in Atlanta on Monday, October 15th. Reports are that shooting will continue through to March 2019. No official announcement yet of how many episodes will be in the first season, although IMDb is listing 8. We also have no definitive air date for the series other than it being in 2019. HBO and Damon Lindelof are not making this easy.

There was also something cagey going on in the North of Wales from September 17 - October 5. HBO was reportedly shooting a new show at Penrhyn Castle in Gwynedd, Wales which many thought was the new Game of Thrones prequel. No photos were allowed anywhere near the sets, and the local residents were very obliging hosts giving up few details. However, when Watchmen star Jeremy Irons was spotted nearby having dinner, that got some people thinking maybe it wasn't Game of Thrones after all, and it was all but confirmed by this post with Tom and co-star Sara Vickers with the hair and make-up team. Since we know nothing for sure about what characters any of the cast are playing, fans can only speculate whether perhaps Tom's character is somehow related to Irons' character, who many think may be playing an older Ozymandias.

It might be harder to hide what they're doing when they are on location in Atlanta, but based on this level of secrecy, it's a good bet they're going to try.