Catherine gave a tour of the Hall of Justice's public areas to tourists. When she got to the display of the Appellaxians, two people in the group got to the subject of G. Gordon Godfrey's show. Catherine was quick to quench the chatter by continuing the tour.
In the comics, Catherine Cobert was in charge of the Paris embassy of the Justice League International.
Originally, Catherine Cobert was included in the pilot movie, and lines were recorded by Stephanie Lemelin. It was cut for time before it went into animation. The design for Catherine, by Jerome Moore, was later reused (with slight modifications) for Cat Grant. When he redesigned her for Young Justice: Invasion, he used a look similar to Gwyneth Palthrow's Pepper Potts from the Iron Man movies.