This is a list of the recurring characters featured on the television series seaQuest DSV. This list does not include characters listed in the main titles of the show or characters introduced in seaQuest 2032. (Those can be located at Characters of seaQuest 2032.)
Ranked as admiral in the UEO navy, Noyce had served with Captain Bridger for many years prior to his appointment to seaQuest. Noyce was usually seaQuest`s liaison to UEO Headquarters and often relayed mission orders and other commands to the ship. Noyce had met future UEO secretary general Andrea Dre at when his own car broke down. They remained friends for years afterwards. However, when Dre had plotted to assassinate the leaders of the various UEO confederations, Noyce had her arrested, impeached, and eventually, was appointed as acting secretary general. Originally stationed at the UEO naval base at Pearl Harbor, Noyce eventually transferred to New Cape Quest when UEO Headquarters was relocated there in 2021.
Replacing William Noyce as the Secretary General of the UEO, McGath was frequently in contact with the seaQuest to issue new orders and missions. Possessing a high amount of respect for Captain Bridger, McGath refused to relieve him of command when a gold helmet believed to be from Atlantis cursed Bridger and caused him to behave irrationally, claiming he did not want the last thing on the captain's record to read "relieved of command by the Secretary General."
By 2032, McGath was still Secretary General as the UEO faced the threat of the expanding Macronesian Alliance under the leadership of President Alexander Bourne. When Captain Oliver Hudson assume command of seaQuest, McGath often found himself at odds with him, however, believed that he was a very capable ship captain. When the UEO constitution came up for renewal later that year, Hudson informed McGath that half of the people in the world believed him to run the UEO like a police state and the other half believed him to be "a big wimp". President Bourne and Larry Deon had attempted to assassinate McGath, however, their plans were foiled, the UEO constitution was renewed and he remained Secretary General.