
Maintaining a lonely vigil in outer space, astronaut John Tracy is International Rescue's Space Monitor, responsible for receiving and analyzing the calls for assistance received by the communications equipment aboard Thunderbird 5. Once he's gathered the details and has assessed the situation, he contacts Tracy Island and informs Jeff Tracy, thereby setting off the chain of events which will send his brothers or Lady Penelope off to the rescue. Though he's served on few actual rescue missions, John constantly contributes updates, performs translation and relays technical data from Brains and Tin-Tin to the rescue sites via the Mobile Control Unit or directly to the ships, thus proving him to be a vital link in the chain of action.