"Game of Thrones" coined the catchphrase "winter is coming," but now PBS' "Downton Abbey" wants to remind us that they're also about to experience some change. The period piece, which is entering its fifth season, will be delving further into the 1920s, and we can expect our friends both upstairs and downstairs to notice.

Creator Julian Fellowes has already announced that Rade Sherbedgia, Anna Chancellor and Richard E. Grant will be joining the cast; now, in this new, super-vague 20-second clip we hear a voiceover provided by Carson (Jim Butler) announcing the inevitable change arriving at Downton.

"Downton Abbey" Season 5 will premiere in the U.K. on ITV this fall. PBS has yet to announce a U.S. air-date. 

Check out the teaser below.