Thanks to a tweet from Orlando Jones (@TheOrlandoJones), we know that Tom, Nicole, Orlando and Lyndie will be appearing at the SAG Foundation Actors Center in Los Angeles for a Sleepy Hollow screening, with a Q&A session afterward. It will be part of the Conversations series that, according to the SAG Foundation website, invites "well-known, working actors to discuss their careers, speak about current projects and share their experiences in the industry with an audience of actors." The event will take place on March 18th at 7pm PDT, but will only be open to active members of SAG-AFTRA and their guests. Luckily, it looks like they very often livestream these events, or shoot and post them on YouTube (thanks to Donna for spotting that!). Once it is confirmed that they'll do one or the other, it will be posted here.
UPDATE: @SAGFoundation was nice enough to confirm that they won't be livestreaming the event, but they will be recording it and posting it to YouTube.