A Cardassian officer travelling aboard the Enterprise with Gul Macet in The Wounded, who is caught examining a computer terminal and confined by his own commander.
Glinn Telle is one of two aides who come aboard the Enterprise with Gul Macet in the fourth-season episode The Wounded, set in 2367. The Cardassians are there as observers while Picard hunts for the USS Phoenix, whose captain Benjamin Maxwell has begun attacking Cardassian ships.
The peace between the two powers is barely a year old, and the guests are watched with suspicion by many of the crew. Telle does nothing to ease it when he is found at a computer terminal he has no permission to use.
Telle claims he was only curious. Macet, anxious to keep Picard's goodwill, rebukes him sharply, orders him confined to quarters and assures the captain that the man will be disciplined.