Captain Jonathan Archer told Zshaar that he would not leave until Tucker was found. Zshaar stated that one of his crew was also missing, and may have fired on Tucker. He agreed to work together with Archer to find the missing crewmen. Despite Vulcans perceiving Arkonians as being difficult to work with, as noted by T'Pol, Archer managed to establish a good working relationship with Zshaar and both of their lost men were retrieved.
Once both men were rescued, Khata'n Zshaar visited Enterprise to retrieve his man, and bid Archer farewell. He wasn't overly friendly towards Archer, but both showed a mutual respect. This first contact was more successful than that of the Vulcans in establishing relations with the Arkonians. (ENT: "Dawn")
In the final draft script of "Dawn", Zshaar was described as older than his crewman, Zho'Kaan. Zshaar's precise age, however, wasn't identified in the script.
Zshaar was featured in a deleted scene from "Dawn". In that scene, he is informed by Captain Archer that a distress call from their stranded crewmen has been received by Enterprise. Although Archer tries to persuade Zshaar to collaborate with the officers from Enterprise in order to send a reply message, Zshaar is reluctant to assist, owing to the presence of T'Pol aboard Enterprise.