Josh McDermitt says that Teo Rapp-Olsson, who plays Sebastian, is "a sweetheart of a guy. and he actually felt bad that he was gonna get punched. He does such a good job as Sebastian."
The stunt performer who played the walker that Negan calls "Blackbeard" is Kirk Riley. He's worked on the show for many years, not just as a stunt person but also as Norman Reedus' stand-in.
According to Executive Producer Denise Huth, Leah's decision to let the father and son go is a callback to her own loss. "She is caught between being the hardened soldier and the grieving mother."
Promises Broken marks a significant milestone for Paola Lázaro: Princess' first on-screen walker kill. While Princess may have shot at walkers last season, this was the first time viewers saw her stabbing a walker up close.