If you didn't already know that "House of the Dragon" was a "Game of Thrones" prequel series, those opening credits were a pretty clear clue. That same rousing theme song — a cello line composed by German composer Ramin Djawadi — from the original HBO series also kicks off each weekly edition of its spinoff, though the visuals differ for each show.
"House of the Dragon," which is set 200 years prior to its predecessor and focuses on the succession war within House Targaryen, shows a literal bloodstream flowing across King Viserys’ detailed model of Old Valyria to signal different branches of the Targaryen family tree. Along with introducing the individuals that make up the show's cast and crew, the opening sequence also shows which Targaryens are connected and how, important info going into the show's second season as the "Dance of the Dragons" civil war between Queen Rhaenyra Targaryen (Emma D'Arcy) and her half-brother King Aegon II (Tom Glynn-Carey) rages on.
