After two more major characters in Game of Thrones were killed off in Sunday's episode, "The Last of the Starks," HBO previewed the upcoming fifth episode in the show's final season with a short but ominous trailer.

The trailer, which you can watch above, offers a glimpse of Jon Snow (aka Aegon Targaryen), Ser Davos Seaworth, and Grey Worm surveying what appears to be Daenerys' siege of a well-guarded King's Landing. Cersei Lannister watches from the Red Keep and Euron Greyjoy sees something in the skies that seems to surprise him — could it be an unexpected dragon attack after his own deadly ambush on Dany's forces on their way to Dragonstone? And will Qyburn's scorpions prove as effective this time around?

Game of Thrones Complete Coverage | 'The Last of the Starks' Episode Review

Game of Thrones airs Sundays at 9/8c on HBO.

PHOTOS: Game of Thrones Season 8, Episode 4: "The Last of the Starks"

 <p>Missandei, Daenerys Targaryen, and Varys in <em>Game of Thrones</em> Season 8, Episode 4, "The Last of the Starks."</p><p>

Missandei, Daenerys Targaryen, and Varys in Game of Thrones Season 8, Episode 4, "The Last of the Starks."