Three ships, two massive water tanks, and a relentless barrage of water cannons. That is the reality of the set for the House of the Dragon Season 3 premiere, a production scale that suggests HBO is not merely returning to Westeros, but attempting to redefine the limits of television spectacle.

Steve Toussaint, who portrays the formidable Lord Corlys Velaryon, offered a rare glimpse into the filming of the show’s upcoming opener during an appearance at SXSW London this week. While showrunner Ryan Condal has already labeled the episode "the craziest episode of television ever made," Toussaint’s description of the practical effects suggests a level of physical intensity rarely seen in high-fantasy production.

"I don’t know what the budget was, but it was a lot," Toussaint told an intimate audience at the Deadline Studio. "They built three ships, built two tanks—a wet tank and a dry tank—and then they just squirted lots of water cannons at us. We cut people’s heads off, they poured blood on us, and it’s mayhem."

The Stakes of the Gullet

The sequence in question is the Battle of the Gullet, a pivotal naval clash in George R.R. Martin’s Fire & Blood that serves as one of the most significant military engagements in the Targaryen civil war. For fans of the source material, the battle is a long-awaited centerpiece. For the production team, it represents a logistical nightmare turned into a technical showcase.

Corlys Velaryon, the "Sea Snake," sits at the heart of this chaos. Toussaint noted that his character’s arc—which has seen him transition from the wealthiest man in Westeros to a man slowly stripped of his legacy—finds a violent crescendo in these opening moments. The battle is not just a tactical exercise for the Master of Ships; it is a desperate attempt to secure the future for his son, Alyn of Hull, played by Abubakar Salim.

A Legacy Defined by Tragedy

Beyond the spectacle of the Gullet, Toussaint reflected on the core of his character. When he first met with showrunners Ryan Condal and Miguel Sapochnik, the conversation rarely touched on the politics of the Iron Throne or the mechanics of sailing. Instead, they focused on the burden of fatherhood.

"The key to this man, despite the fact that he’s a great sailor and warrior, was that most of his motivation is either to put his wife on the throne... and also to secure a legacy for his children," Toussaint said. This focus on the domestic cost of the Dance of the Dragons has been a hallmark of the series, grounding its high-fantasy stakes in the recognizable, if brutal, dynamics of family survival.

Moving Past the Noise

Toussaint also addressed the early, vitriolic backlash regarding his casting—a controversy that erupted before the series even aired. While the character is depicted as white in Martin’s novels, Toussaint’s casting was part of a broader push for diversity within the show’s creative vision.

"I know that there was some concern about somebody like me playing the role," Toussaint said. "But then once we started going, my understanding is that he’s quite a popular character. I mean, I’m still here, so I guess so." He noted that the most meaningful feedback has come from Black fans at conventions who see themselves represented in the high-fantasy landscape for the first time.

Key Takeaways

  • The Gullet Battle: The Season 3 premiere will feature the Battle of the Gullet, described by Toussaint as "mayhem" and involving massive practical sets, including two specialized water tanks.
  • Character Motivation: Corlys Velaryon’s arc in the new season remains heavily tied to his role as a father and his desperate attempts to preserve his family’s legacy amidst the ongoing civil war.
  • Production Scale: The show continues to prioritize practical effects, with Toussaint confirming the use of full-scale ship builds and extensive water-based stunt work to capture the intensity of the naval conflict.

As the series prepares for its June 21 premiere on HBO Max, the pressure is on to deliver a spectacle that justifies the "craziest episode ever" billing. If the practical intensity described by Toussaint is any indication, the show is leaning into the visceral, messy reality of war rather than relying solely on digital artifice. For the Sea Snake, the coming season is not just about winning a battle; it is about surviving the wreckage of his own house.