David Tennant is playing Detective Emmett Carver, an American-version of his original Broadchurch character DI Alec Hardy, Anna Gunnis stepping into Olivia Colman's shoes and is playing Detective Ellie Miller.
Source : https://twitter.com/nopicnic
Both were spotted on set outside the Oak Bay Bistro, which has been converted into the Crestview Rooms & Pub for the production.
Some more images from Twitter user Mrs Mustache. With thanks...
Good view of David's gruff beard there in the last one.
More Gracepoint news as we get it.