However, Revok had informed the Dominion of Damar's visit, and Seskal and the crew of the attack ship came under fire by the Jem'Hadar and the Breen. Seskal was unable to lower the attack ship's shields to beam Damar's team back. Seskal tried valiantly to return fire, but the ship was destroyed, and he was killed. (DS9: "The Dogs of War")
Seskal was played by Star Trek veteran actor Vaughn Armstrong and was the first character he portrayed in more than one episode.
Seskal had only one scene in the first draft script of "The Dogs of War", which was in the teaser, and his fate was considerably different from how he ends up in the final version of the episode. In the teleplay, he was one of multiple victims of a massacre in Damar's base on Vanden Prime, where he was found, in the aftermath of the attack, by Damar, Garak, and Kira. Seskal was barely alive when they discovered him, a Jem'Hadar knife in his chest. Although Damar and Kira brought Seskal medical aid from elsewhere in the ruined base, one of his neck tendons had been severed, with surgical precision; he implied to Damar that he had been tortured for not admitting where Damar had meanwhile been. With his final dying words, Seskal advised Damar not to let the Dominion find him and told Damar he was "the only hope Cardassia has."
Seskal's rank is unknown, as the script of "When It Rains..." described him as both a gul and a glinn. The first draft script of "The Dogs of War" referred to him as a "glin".