[Spoiler Alert: If you have not read Voyager or would prefer to not be spoiled about season three, it is best to skip this post for now.]
Today, Outlander returned to Edinburgh to film more scenes for season three. I believe these were interior scenes at the Signet Library. Sam Heughan, Caitriona Balfe, and extras were seen coming and going from the library.
Update (2/2/2017): Based on Instagram stories from Cesar Domboy and Lauren Lyle, it is apparent that they are also in Edinburgh filming Outlander. And another Instagram story from Cesar makes it obvious that they are filming in the interior of the Signet Library. More photos of the production from the outside are added below.
Update (2/3/2017): More photos and videos added from today. Additional cast members spotted include David Berry (Lord John Grey) and Gary Young (Mr. Willoughby).
Looks like more #Outlander filming in #Edinburgh. Can't wait to watch season 3 pic.twitter.com/CEIVcDcrxF
— EdinburghTourGuides (@EdinburghGuides) February 1, 2017
Just a small reminder that Colonnades will be fully booked between 30 January and 8 February 2017, apologies for the inconvenience! pic.twitter.com/wzqVcyNJo3
— The Signet Library (@signetlibrary) January 29, 2017
More filming on the streets today! #Outlander pic.twitter.com/8zmf3nB7qq
— Edinburgh Reporter (@EdinReporter) February 2, 2017
https://twitter.com/MercatToursLtd/status/827080144674250752
I wonder what they're filming next to the Court of Session here in Edinburgh today pic.twitter.com/e0rzVW5wwO
— Stuart Clubb (@SClubbLawyer) February 2, 2017
https://twitter.com/Annika_N83/status/827629287339606018
@caitrionambalfe thank you for stopping by and signing our books / having pictures taken. It made my day! #outlander pic.twitter.com/7774XUzdvA
— Annette Megaughin (@AnetteMegaughin) February 2, 2017
We've stumbled across @Outlander_STARZ filming in Edinburgh's West Parliament Square. Nice costumes, guys! #HeartNews pic.twitter.com/mofZeV4uci
— LBC News Scotland (@LBCNewsScot) February 3, 2017
More #Outlander filming in Edinburgh today – no sign of the actors sadly pic.twitter.com/q64ezvZZ4p
— Florence Snead (@Florence_Snead) February 3, 2017
Still filming Outlander!! Can't wait for season 3 pic.twitter.com/XSprWnuZJo
— Annika Schiffer (@annika_schiffer) February 3, 2017
Sam part 3 pic.twitter.com/cnxD1Kc5Vn
— stewart (@stewart9395) February 3, 2017
— stewart (@stewart9395) February 3, 2017
Sam signing autographs at end of shooting pic.twitter.com/9c1f8ZNMGh
— stewart (@stewart9395) February 3, 2017
David Berry leaving in costume pic.twitter.com/MznBtMSSyj
— stewart (@stewart9395) February 3, 2017
The extras leave pic.twitter.com/9mkrTGvxNb
— stewart (@stewart9395) February 3, 2017
Brother and Gary young I got cut Outlook pic.twitter.com/uydXe0Peuc
— stewart (@stewart9395) February 3, 2017
Outlander filming at St Giles pic.twitter.com/uV4IQDtnny
— stewart (@stewart9395) February 3, 2017
Outlander filming site royal mile st giles pic.twitter.com/my8My8SwHY
— stewart (@stewart9395) February 3, 2017
Source: Rex Features, Respective Twitter accounts