Steve Toussaint has given further detail on Corlys Velaryon's role in the House of the Dragon Season 3 finale, confirming that the character's severed finger was created using a real cast of the actor's own hand, and that he first learned of the mutilation from reading the script rather than being told directly. He also expanded on why Corlys retains authority even as a captive of Ormund Hightower's (James Norton) forces, noting that the character's bearing and reputation command respect from friend and foe alike, allowing him to take charge of the peace negotiations Gwayne (Freddie Fox) attempts to broker with Daemon Targaryen (Matt Smith).

The finale sees Corlys captured after Rhaenyra (Emma D'Arcy) refuses his request to legitimise his sons Alyn (Abubakar Salim) and Addam (Clinton Liberty), a storyline the show has significantly altered from George R.R. Martin's original text. Toussaint told Collider he particularly enjoyed portraying Corlys' diplomatic strength in captivity, and praised working alongside Norton during the brutal Tumbleton battle sequences that frame the episode's climax.