Very little is known about Mrs. Tracy, other than that she is the wife of Colonel Jeff Tracy, and the mother of his five sons. She was only been mentioned in Home on the Range, where is it revealed that the Tracy Ranch was originally in her family and now belongs to her boys and for the use of International Rescue. In that episode, Virgil says that she used to take the boys horseback riding. Her fate is unknown, although it may be assumed that she is now deceased as she is not present and since Captain Lee Taylor helped Jeff to develop International Rescue. It is assumed that she hasn't been present for a long time. Additionally, Alan stated that he was away at school when his mother was alive as well as the time that Jeff's started to develop his plans for International Rescue. As a result, Alan is the only son to have no real memories of his mother (or Captain Lee Taylor).